The objective of this page is to build a comprehensive list of open-source C++ libraries, so that when one needs an implementation of particular functionality, one neednât to waste time searching on web (DuckDuckGo, Google, Bing, etc.)
If you know a library that might be useful to others, please add a link to it here. There are no restrictions on what can be included except that the source of the library must be readily available to download.
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Package manager Description build2 An open-source (MIT), cross-platform build toolchain that aims to approximate Rust Cargoâs convenience for developing and packaging C/C++ projects while providing more depth and flexibility, especially in the build system. cget Cmake package retrieval. This can be used to download and install cmake packages. cmodule Non-intrusive cmake dependency management. conan Decentralized, open-source (MIT), C/C++ package manager. CPM.cmake A cmake script that adds dependency management capabilities to cmake. Itâs built as a thin wrapper around cmakeâs FetchContent module that adds version control, caching, a simple API and more. hunter A cmake driven cross-platform package manager for C/C++ projects. spack A package manager for supercomputers, Linux, and macOS. It makes installing scientific software easy. It isnât tied to a particular language. teaport A cocoapods inspired dependency manager. vcpkg A C/C++ package manager for Windows, Linux, and macOS. xmake A cross-platform Lua-based C/C++ build tool and package manager. Library Description License Configuration Amplitude Audio SDK A cross-platform audio engine designed with the needs of games in mind. (Src) Apache-2.0 cmake, vcpkg Aquila An open-source and cross-platform DSP library for C++11. MIT cmake Aubio A C/Python library for audio and music analysis. (Src) GPL-3.0 make audioFlux A C library for audio and music analysis, feature extraction. MIT Essentia An open-source library and tools for audio and music analysis, description and synthesis (MIR) (Src) Affero GPLv3 FFTW A library for computing the DFT (SSE/SSE2/AVX/Altivec/ARM Neon). (Src) GPL-2.0 cmake FMOD An easy to use cross-platform audio engine and audio content creation tool for games. Free for non-commercial/Commercial cmake KFR A fast, modern, C++17, open-source, cross-platform DSP/DFT framework, supports Audio resampling, FIR/IIR filters, Biquad, (SSE, AVX, AVX-512, ARM NEON). (Src) GPL-2.0 cmake libsoundio A C library for cross-platform real-time audio input and output. (Src) MIT cmake Maximilian C++ Audio and Music DSP Library. MIT cmake Miniaudio An audio playback and capture C library. (Src) Unlicense single source file ni-media C++ library for reading and writing audio files. MIT cmake, vcpkg OpenAL A cross-platform audio API. BSD/LGPL/Proprietary cmake PortAudio PortAudio is a free, cross-platform, open-source, audio I/O library. (Src) MIT cmake, vcpkg rnnoise Recurrent neural network for audio noise reduction. BSD-3-Clause make SELA SimplE Lossless Audio. MIT cmake SoLoud Easy, portable audio engine for games. zlib Soundtouch The SoundTouch is an open-source cross-platform audio processing library for changing the Tempo, Pitch and Playback Rates of audio streams or audio files. (Src) LGPL-2.1 make Tonic Easy and efficient audio synthesis in C++. Unlicense Verovio A fast and lightweight music notation engraving library. (Src) LGPL cmake, qmake Wav2Letter++ A fast speech recognition toolkit written entirely in C++ and uses the ArrayFire tensor library and the flashlight machine learning library for maximum efficiency. BSD License cmake Library Description License Configuration AudioFile A simple C++ library for reading and writing audio files. MIT cmake audio_file A library that handles reading and writing audio files in many common formats. (Src) LGPL-2.1 make dr_libs Single-file audio (FLAC, MP3, WAV) decoding libraries for C and C++. Unlicense flac The FLAC stands for Free Lossless Audio Codec, meaning that audio compressed in FLAC has no loss in quality. FLAC stands out as the fastest and most widely supported lossless audio codec, non-proprietary, and unencumbered by patents. Open Source, BSD, GPL LAME LAME is a high quality MPEG Audio Layer III (MP3) encoder. LGPL libsndfile A C library with C++ wrapper for reading and writing files containing sampled sound (e.g. WAV, AIFF) through one standard library interface. (Src) LGPL-2.1 cmake, make, vcpkg minimp3 Minimalistic MP3 decoder CC0-1.0 header-only Opus A totally open, royalty-free, highly versatile audio codec. BSD cmake Vorbis Ogg Vorbis is a fully open, non-proprietary, patent-and-royalty-free, general-purpose compressed audio format. BSD cmake Library Description License Configuration benchmark A library to benchmark code snippets, similar to unit tests Apache 2.0 cmake Celero A feature-rich C++ Benchmark Authoring Library/Framework. Supports Windows, Linux, and OSX using C++11. Apache cmake Criterion A micro-benchmarking library for modern C++ MIT header-only; cmake gperftools The 'Google Performance Tools' includes a high-performance, multi-threaded malloc implementation plus tools for benchmarking heap allocation and CPU utilization. BSD 3-Clause "New" or "Revised" configure nanobench A simple, fast, accurate single-header micro-benchmarking functionality for C++11/14/17/20. (Src) MIT header-only; cmake picobench A tiny (micro) micro-benchmarking library MIT header-only; cmake plf::nanotimer A lowest-overhead, cross-platform simple timer class for benchmarking. zlib header-only Library Description License Configuration ACE Asynchronous networking, event de-multiplexing, messaging (Src) (Doc) Custom make Apache Thrift The Apache Thrift software framework, for scalable cross-language services development, combines a software stack with a code generation engine to build services that work efficiently and seamlessly between C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C#, Cocoa, JavaScript, Node.js, Smalltalk, OCaml and Delphi and other languages. (Src) Apache-2.0 cmake, vcpkg Boost.Asio Asynchronous and synchronous networking, timers, serial I/O BSL-1.0 Boost.Beast An HTTP and WebSocket library built on top of Boost.Asio BSL-1.0 Breep An event based, high-level, peer-to-peer library, allowing users to directly send and receive objects. European Union Public License 1.1 cmake brpc An industrial-grade RPC framework used throughout Baidu, with 1,000,000+ instances and thousands kinds of services. (Src) (Doc) Apache 2.0 cmake C++ REST SDK An asynchronous HTTP client and listener, asynchronous Stream, URI, JSON MIT cmake cpp-httplib A C++11 single-file header-only cross platform HTTP/HTTPS library MIT header-only; cmake cpp-netlib A C++ Network Library BSL-1.0 cmake cppsimpleuri A modern C++ uri & query parser MIT cmake cpr A modern C++ HTTP requests library MIT cmake Crow A C++ micro web framework (inspired by Python Flask) BSD-3-Clause header-only; cmake curlpp C++ wrapper for libcURL (CURL library). (Src) cmake, vcpkg DumaisLib Various utilities such as WebServer, JSON, WebSocket server, REST framework (a library for creating a REST API in your c++ app) MIT make EasyHttp A cross-platform HTTP client library with a focus on usability and speed, supporting http response caching and more. MIT cmake eCAL A high performance inter-process communication library Apache 2.0 cmake fineftp-server An FTP-server library for Windows and Unix MIT cmake FPNN Fast Programmable Nexus Network. High performance fully asynchronous RPC service framework. Simultaneously supporting HTTP, WebSocket, TCP, and reliable UDP. Support the development of ultra-high load servers, with corresponding client SDKs. æªç¥ make gRPC A modern open-source high performance RPC framework that can run in any environment. (Src) (Doc) Apache-2.0 bazel, cmake, vcpkg gsoap A C/C++ development toolkit for XML data bindings, fast WSDL/SOAP/XML Web services, WS-Security, JSON/XML-RPC RESTful services GPLv2 hmbdc A lightweight and high performance C++17 message pub/sub middleware framework/lib header-only HTTPP A simple, C++14, production ready HTTP-server built on top of Boost and a client built on top of libcurl. BSD 2-Clause "Simplified" cmake, make IXWebSocket An open-source WebSocket + HTTP library without dependency, supports SSL and the per message deflate WebSocket extension. BSD 3-Clause "New" or "Revised" cmake, make KCP A fast and reliable ARQ protocol that helps applications to reduce network latency. MIT cmake libashttp An asynchronous HTTP client library GNU Lesser General Public v3.0 libjson-rpc-cppA framework that provides cross-platform JSON-RPC (remote procedure call) support for C++, fully JSON-RPC 2.0 & 1.0 compatible.
MIT cmake, conan libnavajo A C++ framework including a fast multithreaded http server, HTML5 Websockets, SSL, X509 and HTTP authentification, compression, cookies and advanced session management, IPv4 and IPv6 (CeCILL-C). CeCILL-C FREE SOFTWARE LICENSE AGREEMENT cmake libtins A network packet crafting and sniffing library (Src) (Doc) BSD-2 cmake, vcpkg LiteNetLibPP A lightweight reliable UDP library for games MIT cmake mailio MIME and email library BSD 2-Clause "Simplified" cmake nanomsg A fast message queue, zeromq successor netif A C++14 library for getting network addresses on Windows, Linux, macOS, and FreeBSD. BSD 3-Clause "New" or "Revised" header-only; cmake nghttp2 HTTP/2 C Library and tools (server, client, proxy and benchmarking tools) MIT cmake, configure ngrest A fast and easy in use JSON RESTful Web Services Framework Apache 2.0 cmake nng A fast message queue, nanomsg successor Oat++ A Web Framework: REST-API and Request implementation (Src) (Doc) Apache 2.0 cmake omniORB The fastest, complete and portable CORBA ORB implementation in C++ OpenDDS DDS (Data Distribution Service) implementation Paho MQTT A modern C++ client for MQTT from Eclipse cmake paozhu A C++20 Web Framework Support HTTP/2 ORM WebSocket MIT cmake PcapPlusPlus Multi-platform C++ network sniffing and packet parsing and crafting framework. Provides C++ wrappers for many popular packet processing engines such as libpcap, Npcap, WinPcap, DPDK, AF_XDP, and PF_RING. (Src) Unlicense conan, homebrew, cmake, vcpkg POCO Networking: encryption, HTTP; Zip files (Doc) rest_rpc A C++11, high performance, cross-platform, easy to use RPC framework. MIT cmake restbed A cross-platform feature rich framework brings asynchronous RESTful functionality (secure communication over HTTP) to C++14 applications. License cmake restc-cpp Accessing JSON API's from C++. HTTP Client, native C++ class to/from JSON serialization, asynchronous IO trough boost::asio coroutines. C++14. MIT cmake restful_mapper ORM for consuming RESTful JSON APIs in C++ cmake, make seastar A high performance server-side application framework, based on C++14/C++17. Apache 2.0 cmake, etc. Silicon The Silicon C++14 Web Framework: Fast and Robust Web APIs MIT cmake sockpp A simple, modern C++ socket library BSD 3-Clause "New" or "Revised" cmake stream-client A lightweight Boost-based client-side socket/connector/socket pool/resolver Apache 2.0 header-only; cmake tacopie A C++11 TCP Library MIT cmake TAO CORBA taox11 A C++11 based CORBA implementation MIT Unicomm Asynchronous networking, high-level TCP communication framework uvw A libuv (cross-platform asynchronous I/O) wrapper in C++17 MIT header-only; cmake WNetWrap A WinInet wrapper in C++ MIT wvstreams A C++ networking library including UniConf and a convenient D-Bus API GPL zeromq A fast message queue Library Description License Configuration AdaptiveCpp Provides a SYCL and C++ parallel STL offloading compiler and runtime system for CPUs and GPUs from NVIDIA, AMD, Intel BSD-2-Clause cmake Asyncpp An asynchronous c++ library that provides various concurrent operations MIT cmake BlockingCollection C++11 thread safe, multi-producer, multi-consumer blocking queue, stack & priority queue class GPL-3.0 header-only Boost.Atomic Provides atomic data types and operations on these data types, as well as memory ordering constraints required for coordinating multiple threads through atomic variables. BSL-1.0 Boost.Compute A GPU/parallel-computing library for C++ based on OpenCL. BSL-1.0 cmake Boost.Context A C++11 library that provides a cooperative multitasking abstraction on a single thread. BSL-1.0 Boost.Interprocess Simplifies the use of interprocess communication and synchronization mechanisms and offers a wide range of them: shared memory, memory-mapped files, semaphores, mutexes, condition variables and upgradable mutex types, named versions of the synchronization objects, file locking, message queues. BSL-1.0 Boost.Lockfree Provides non-blocking (aka lock-free) concurrent data structures: a queue, a stack, and a ringbuffer (spsc_queue). BSL-1.0 Boost.MPI A C++-friendly interface to the standard Message Passing Interface BSL-1.0 Boost.Thread Enables the use of multiple threads of execution with shared data and means for synchronizing data between the threads. BSL-1.0 concurrencpp Modern concurrency for C++. Tasks, executors, timers and C++20 coroutines. MIT cmake dispenso High-performance concurrency for C++. parallel_for, Futures, pipelines, timers, timed/periodic tasks, and concurrent data structures. MIT cmake Highway Provides performance-portable, length-agnostic SIMD/vector intrinsics. Supports: SSE3, SSE4, AVX*, NEON, SVE*, WASM SIMD, RISC-V, POWER. (Doc) Apache-2.0 cmake HPX A general purpose C++ runtime system for parallel and distributed applications of any scale (Doc) BSL-1.0 cmake, vcpkg Intel TBB Intel® TBB is a cross-platform C++ library for shared memory parallel programming and heterogeneous computing. The library provides: generic parallel algorithms, concurrent containers, a scalable memory allocator, work-stealing task scheduler, and low-level synchronization primitives. (Src) (Doc) Apache-2.0 or Commercial cmake, make KOKKOS A programming model for writing performance portable HPC applications, using CUDA, HIP, SYCL, HPX, OpenMP and C++ threads as backends (Doc) Custom cmake, make libopenmpi The Open MPI Project is an open-source Message Passing Interface implementation 3-clause BSD libsimdpp A portable zero-overhead C++ low level SIMD library. Boost header-only; cmake MPL A C++-17-friendly interface to the standard Message Passing Interface BSD 3-Clause "New" or "Revised" header-only; cmake MutexGear A mutex-only synchronization C/C++ library: wheel, rwlock, maintlock, work queues The MutexGear Library configure, msvc, make OpenMP The OpenMP API specification for parallel programming PoCL A portable retargetable open-source (LLVM based) implementation of the OpenCL standard. (Src) (Doc) MIT cmake RaftLib A C++17 stream-like concurrent actors that enable parallel data-flow computations Apache-2.0 cmake SObjectizer A small cross-platform framework for concurrent and event-driven applications in C++ by using actor and publish-subscribe models. BSD-3-Clause cmake, vcpkg, conan stdgpu Efficient STL-like Data Structures on the GPU Apache 2.0 cmake subprocess C++17/20 cross-platform library for running subprocesses MIT cmake, teaport Taskflow Parallel Task Programming in Modern C++ TASKFLOW MIT cmake task-thread-pool Fast and lightweight thread pool for C++11 and newer. BSD-2-Clause or MIT or BSL-1.0 cmake, vcpkg, single header ThreadPool A simple light-weight thread pool BSD-3-Clause header-only; cmake, make thread_pool A modern, fast, lightweight thread pool MIT cmake Thrust STL-like parallel algorithms and data-structures on top of CUDA, TBB, or OpenMP Apache v2.0, Boost v1.0. cmake TimerAlarm Timers and Alarms based on threads. BSD-3-Clause header-only; cmake, make VexCL A C++ vector expression template library for OpenCL, CUDA, OpenMP MIT cmake ViennaCL Linear algebra and algorithms with OpenMP, CUDA, and OpenCL backends. (Src) (Doc) Custom cmake Xenium A C++17 library that provides various concurrent data structures and reclamation schemes. MIT header-only; cmake Library Description License Configuration Boost.Program_options The library allows to obtain program options, that is (name, value) pairs from the user, via conventional methods such as command line, config file, and environment variables. BSL-1.0 figcone Read JSON, YAML, TOML, XML or INI configuration by declaring a struct MS-PL cmake gconfmm A cross-platform (official) C++ interface for the popular GUI library GTK, including typesafe callbacks, and a comprehensive set of widgets that are easily extensible via inheritance. gtkmm uses STL, including strings, containers, and iterators. UTF8 is supported. (Src) (Doc) LGPLv2.1 autotools, meson, make libconfig A simple cross-platform C/C++ library for processing structured configuration files ("*.cfg") (Src) (Doc) LGPL 2.1 autotools, cmake, make libconfini An cross-platform INI parser written in C (Doc) GPL-3.0 autotools, make uconfig A lightweight C++17 configuration library Apache 2.0 header-only; cmake Library Description License Configuration Argh! A minimalist argument handler. BSD 3-Clause header-only; cmake, vcpkg argparse (hbristow) A slimline C++ class for parsing command-line arguments, with an interface similar to python's class of the same name. BSD argparse (morrisfranken) A lightweight library for parsing command line arguments in an elegant manner. Apache 2 header-only; cmake argparse (p-ranav) A command-line argument parser for C++17 MIT header-only; cmake, vcpkg args A simple C++ argument parser library. MIT header-only; cmake, conan, meson, vcpkg Boost.Program_options The library allows to obtain program options, that is (name, value) pairs from the user, via conventional methods such as command line, config file, and environment variables. BSL-1.0 CLI11 A C++11 command line parser that provides a rich feature set with a simple and intuitive interface. BSD-3-Clause header-only; cmake, meson, vcpkg clipp Powerful & Expressive Argument Parsing for Modern C++. MIT header-only; cmake, vcpkg cmd_line_parser Command line parser for C++17. MIT header-only; cmake cmdlime A C++17 library for command-line parsing that provides a concise, declarative interface with support for sub-commands, validators, and the ability to choose either the GNU, POSIX, or X11 command-line options format. MS-PL cmake cxxopts A lightweight C++11/C++17 command-line arguments parser, supporting the standard GNU style syntax for options. MIT header-only; bazel, cmake fire-hpp Create fully functional CLIs using function signatures. BSL-1.0 header-only; cmake flags Simple, extensible C++17 argument parser. Unlicense header-only; cmake gflags A library that implements command-line flags processing. It includes built-in support for standard types such as string and the ability to define flags in the source file in which they are used. BSD cmake structopt Parse command line arguments by defining a struct. MIT header-only; cmake tclap A simple C++ template library for parsing command line arguments. The library provides a simple, flexible object-oriented interface. MIT cmake Library Description License Configuration ArduinoJson C++98/11/14/17 JSON library for Arduino, IoT and embedded C++ MIT cmake Boost.JSON The JSON parsing, serialization, and DOM in C++11/17 BSL-1.0 cajun-jsonapi A C++ API for the JSON with an emphasis on an intuitive, concise interface that mimic standard C++ as closely as possible. make DAW JSON Link A C++17 library providing static C++ bindings with type checking allowing of parsing directly to user data structures without library allocation, push/pull modes, allocator support, constexpr BSL 1.0 cmake Glaze One of the fastest JSON library (C++23) with direct memory serialization. Also supports BEVE and CSV. MIT cmake, conan, build2, vcpkg jansson A C library for encoding, decoding and manipulating JSON data with UTF-8 support MIT cmake, make jeayeson A very sane C++14 JSON library BSD-3 header-only jios JSON Input Output Streams MIT cmake JOST json Niels Lohmann JSON for C++11, featuring intuitive syntax MIT header-only; bazel, cmake, meson Jsonifier A few C++20 classes for extremely fast JSON parsing/serializing MIT cmake JSON Voorhees Killer JSON for C++11 (Doc) Apache-2.0 cmake JSON++ json11 A tiny JSON library for C++11, providing JSON parsing and serialization. MIT cmake JsonBox A C++ library used to read and write JSON with ease and speed. MIT cmake jsoncons A library for JSON and JSON-like data formats, with JSON Pointer, JSON Patch, JSONPath, CSV, MessagePack, CBOR, BSON, UBJSON. Custom header-only jsoncpp A library that allows manipulating JSON values, including serialization and de-serialization, while preserving comments. MIT cmake, conan, vcpkg libjson minijson A C++ DOM-less and allocation-free JSON parsing and serialization Custom cmake Neyson Lightweight A C++11 JSON Library BSD-3-Clause cmake nosjob A C++98 library for generating and consuming JSON data MIT make qjson rapidjson A fast JSON parser/generator for C++ with both SAX/DOM style API, supports UTF-8/16/32, optionally uses SIMD. (Doc) Custom header-only; cmake, vcpkg simdjson Parse gigabytes of JSON per second taking advantage of modern micro-architectures and parallelizing with SIMD (Doc) (Kino) Apache-2.0 cmake, vcpkg struct_mapping Maps JSON to and from a C++ structure MIT cmake swxJson The most convenient C++JSON library currently in use. Read and write complex structures at any level with just one function call. The performance is approximately half that of RapidJSON. MIT make ThorsSerializer JSON/BSON/YAML Input Output Streams MIT make ujson µjson is a small, C++11, UTF-8, JSON library cmake yyjson A high performance JSON library written in ANSI C MIT cmake Library Description License Configuration Boost.Bimap A bidirectional maps library that offers associative containers such asbimap<X,Y> in which both X and Y can be used as a key. (Src) BSL-1.0 Boost.Container A library that implements several well-known containers, including stdlib-like containers, as well as recursive containers, and new useful containers: flat_map, flat_set, flat_multimap, flat_multiset, stable_vector, static_vector, small_vector, devector. (Src) BSL-1.0 header-only Boost.Fusion A library for working with heterogeneous collections of tuples. Provides a set of containers (vector, list, set and map), along with transformed presentation of their underlying data, a.k.a views." (Src) BSL-1.0 Boost.Heap An implementation of priority queues with more functionality and different performance characteristics, than stdlib has. (Src) BSL-1.0 Boost.Pointer Container Provides containers for holding heap-allocated objects in an exception-safe manner and with minimal overhead. (Src) BSL-1.0 Boost.Tuple Implements pre-C++11 n-tuple (a fixed size collection of elements) (Src) BSL-1.0 Boost.Variant Implements pre-C++17 variant (a safe, generic, stack-based discriminated union container) (Src) BSL-1.0 C++ Allocators Standard library conformant allocators for fixed size static and stack based memory + another conformant allocator that allows custom boundary allocation BSD-3-Clause cmake, make cpp-btree B-tree containers make better use of the CPU cache: btree_map, btree_set, btree_multimap, btree_multiset. (Src) Apache-2.0 header-only; cmake DataFrame C++ DataFrame for statistical, Financial, and ML analysis -- in modern C++ using native types and continuous memory storage BSD-3-Clause cmake, make, conan, vcpkg eggs::variant Eggs.Variant is a C++11/14/17 generic, type-safe, discriminated union. It is notable in particular for having very good constexpr support. BSL-1.0 cmake Frozen C++14 constexpr perfect-hashing-based immutable sets, maps, and algorithms. Apache-2.0 header-only; cmake Immer A library of persistent and immutable data structures Boost cmake plf::colony Unordered "bag-like" container which outperforms std:: containers in high-modification scenarios while maintaining valid pointers to non-erased elements regardless of insertion and erasure. C++98/11/14/etc-compatible. See also P0447 (std::hive). (Src) zlib conan build2 plf::list A std::list implementation which sacrifices range-splicing for cache-friendliness, yielding faster insertion, erasure and iteration. C++98/03/11/14/17/20/23/26/etc-compatible. (Src) (Doc) zlib — plf::reorderase An extension and optimization of the "swap-and-pop"/"move-and-pop" idiom for random access containers to increase random_access container erase performance, when post-erasure order is unimportant. Covers single, range and std::erase_if-style erasures. C++98/11/14/etc-compatible. (Src) zlib plf::queue A drop-in replacement container for the std::queue container adaptor with better performance than std::deque and std::list in a queue context. C++98/11/14/etc-compatible. (Src) zlib plf::stack A drop-in replacement container for the std::stack container adaptor with better performance than std::vector and std::deque in a stack context. C++98/11/14/etc-compatible. (Src) zlib ring_span A lite implementation of Arthur O'Dwyer's ring_span, a.k.a. circular buffer view. C++98- compatible. BSL-1.0 header-only; cmake strict_variant A realtime/embedded-friendly (i.e. -fno-exceptions/-fno-rtti compatible), never-empty variant targetting C++11. Fast, prevents many undesirable implicit conversions. BSL-1.0 cmake tiny::optional An replacement for std::optional that enables the use of sentinel values to eliminate memory storage overhead. BSL-1.0 cmake Ygg An intrusive C++11 implementation of high-performance containers and data structures such as a Redâblack tree, an Interval tree and an Interval Map. MIT header-only; cmake Library Description License Configuration Botan A cryptography Toolkit. (Src) BSD 2-Clause "Simplified" make crypto++ A free C++ Class Library of Cryptographic Schemes. (Src) Boost make gnutls A secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. (Src) LGPL-2.1 make openssl A robust, commercial-grade, full-featured toolkit for general-purpose cryptography and secure communication. (Src) Apache-2.0 make TomCrypt A fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines. (Src) public domain cmake, make Library Description License Configuration Boost::MySQL MySQL client library BSL-1.0 cpp-redis C++11 Lightweight Redis client: async, thread-safe, no dependency, pipelining, multi-platform. (Doc) MIT cmake DTL Makes ODBC record-sets look just like an STL container (Src) (Doc) EasyQtSql A lightweight C++11 (Qt based) library for quick and easy SQL querying MIT header-only; qmake Galera The Galera Cluster is the synchronous multi-master replication library (Galera) and a Write Set Replication (WSREP) API for MySQL/MariaDB (Src) GPLv2 cmake, scons LevelDB A C++ library developed by Google that handles billion-scale Key-Value data persistence storage. (Doc) BSD-3 cmake libpqxx The C++ connector for PostgreSQL (Src) BSD-3 cmake, make lmdb++ C++11 wrapper for the LMDB embedded B+ tree database library. Unlicense make mongocxx An official C++11 driver library for MongoDB (Doc). It offers optimized APIs for CRUD operations, indexing, and aggregation. Supporting BSON and featuring connection pooling and authentication mechanisms, it provides high-performance and scalable solutions for building C++ applications that leverage MongoDB. Apache 2.0 cmake mysql++ MySQL DB and tools nanodbc A small, cross-platform, C++14 wrapper for the native C ODBC API MIT cmake ODB An open-source, cross-platform, and cross-database object-relational mapping (ORM) system for C++. ODB supports MySQL, SQLite, PostgreSQL, Oracle, and Microsoft SQL Server relational databases as well as C++98/03 and C++11 language standards. GPL2 and/or NCUEL OTL A C++ template based database library for Oracle DB, ODBC and DB2-CLI. (Src) Pgfe The PostgreSQL client (FrontEnd) API in modern C++ Zlib cmake QTL A friendly and lightweight C++ database library for MySQL, SQLite and ODBC. Apache-2.0 make QUINCE QUeries IN C++ Expressions (ORM+EDSL) Boost QxOrm An Object Relational Mapping (ORM) database library for C++/Qt, supports most common databases, serialization (JSON, binary, XML); standalone multi-threaded HTTP web server GPLv3 or Proprietary redis-cpp A lightweight C++17 client library for executing Redis commands. MIT header-only; cmake redis-plus-plus A Redis client written in C++ 11, and supports Redis Sentinel, Redis Cluster, pipeline, transaction, pubsub, connection pool and STL-like interface Apache-2.0 cmake SOCI A plugin-based database library that embeds SQL queries in a regular C++ code; supported backends include: DB2, Firebird, MySQL, ODBC (generic backend), Oracle, PostgreSQL, SQLite3. (Src) (Doc) Boost cmake SQLAPI++ A middleware C++ database library that supports multiple SQL database systems: Oracle, SQL Server, DB2, Sybase, MySQL, PostgreSQL, SQLite, Informix, InterBase / Firebird, SQLBase, SQL Anywhere, ODBC, MariaDB. (Src) (Doc) Custom make SQLiteCPP A lean and easy to use C++ SQLite3 wrapper. MIT cmake, meson, vcpkg SQLite ORM An Embedded Domain-Specific Language (EDSL) for SQL, as understood by SQLite, for modern C++. AGPL-3.0, MIT header-only; cmake, vcpkg sqlpp11 A type safe embedded domain specific language for SQL queries and results in C++. BSD-2 cmake taoPQ A lightweight C++17 PostgreSQL client library Boost cmake Library Description License Configuration AngelScript A scripting language like C++. ZLib ChaiScript An easy to use embedded scripting language for C++. BSD-3-Clause cling An interactive C++ interpreter, built on top of Clang and LLVM to leverage RAD, creating scripts, embeddable scripting, and runtime code generation. (Src) Custom / LGPL cmake ExprTk A simple to use, easy to integrate and extremely efficient run-time mathematical expression parser and evaluation engine. ExprTk supports numerous forms of functional, logical and vector processing semantics and is very easily extendible. Jinx A scripting language designed for video games. MIT cmake spidermonkey.dev Mozillaâs JavaScript and WebAssembly Engine. muparser An extensible high performance math expression parser library written in C++. BSD-2-Clause cmake PythonQt A dynamic Python binding for the Qt framework. It offers an easy way to embed the Python scripting language into C++ Qt applications. LGPL 2.1 lua A lightweight multi-paradigm scripting language designed primarily for embedded use. C library. MIT make sol2 A modern C++ library binding to Lua. MIT header-only; cmake v8pp Binds C++ functions and classes into V8 JavaScript engine. BSL-1.0 header-only; cmake Library Description License Configuration Kigs-framework A modular multi-purpose cross-platform framework MIT openFrameworks MIT SDL Simple DirectMedia Layer: a cross-platform (Windows, macOS, Linux, iOS, Android, and others), low level access to audio, keyboard, mouse, joystick, and graphics hardware via that platform's graphics API (OpenGL/Direct3D/Metal/Vulkan) (Doc) (Src) zlib cmake SFML Simple and Fast Multimedia Library; multi-platform (Windows, Linux, macOS and soon Android & iOS); provides a simple interface to ease the development of games and multimedia applications. It is composed of five modules: system, window, graphics (over OpenGL), audio and network. zlib/png cmake SIGIL Sound, Input, and Graphics Integration Library; a simple, cross-platform, minimalist library for text, shapes, input, audio, and 2D images. Supported platforms: Windows, Linux and Raspberry Pi License cmake Library Description License Configuration Abseil An open-source collection of C++ library code from Google designed to augment the C++ standard library. (Doc) (Src) Apache-2.0 cmake Abstract Intrusive Containers More flexible than Boost.Intrusive, but not STL-compatible. Au A C++14-compatible physical units library with no dependencies with emphasis on safety, accessibility, and performance. (Doc) Apache 2.0 header-only BDE The Bloomberg Development Environment core libraries from Bloomberg L.P. Apache Better Enums Reflective enums (enum to string, iteration, etc.) with constexpr support. BSD-2 header-only, cmake, make bitfield.h Bit-field structure facility, more portable/flexible than the base language facility. Boost A large collection of generic libraries BSL-1.0 CAF The C++ Actor Framework (CAF) is an open-source C++11 actor model implementation featuring lightweight & fast actor implementations, pattern matching for messages, network transparent messaging, and more BSD Cinder A community-developed, free and open-source library for professional-quality creative coding in C++. (Doc) (Src) Modified BSD cmake CommonPP A multi-purpose library with a strong emphasis on getting metrics out of a project. BSD composite_op.h Basic class data member introspection, cumbersome and often non-re-entrant, but sometimes useful. cpp-mmf A C++98 library that encapsulates memory-mapped-files for POSIX or Windows cxxomfort Backports of C++ features (C++11 to C++03 and C++1y proposals to C++11/C++03). Dlib Networking, threads, graphical interfaces, data structures, linear algebra, machine learning, XML and text parsing, numerical optimization, Bayesian nets, and numerous other tasks Boost eventpp A C++ event library for callbacks, event dispatcher, and event queue. With eventpp you can easily implement signal and slot mechanism, publisher and subscriber pattern, or observer pattern. Apache 2.0 fcppt Freundlich's C++ Toolkit (fcppt) is a collection of libraries focusing on improving general C++ code by providing better types and making use of functional programming. Folly Facebook open-source library. A cross-platform library of C++14 components designed with practicality and efficiency in mind. (Doc) Apache-2.0 cmake, vcpkg GSL C++ Core Guidelines Support Library implementation, recommended by Bjarne Stroustrup, Herb Sutter and Co in C++ Core Guidelines MIT cmake, vcpkg gsl-lite A version of ISO C++ Guideline Support Library (GSL) for C++98, C++11 and later MIT header-only GUL14 General Utility Library for C++14 from DESY: Often-used utility functions and types, including String utilities, Statistics and Numeric functions, Containers, Debugging means, etc. (Src) LGPL-2.1 meson, vcpkg History Modern C++17 Undo/Redo Framework Unlicense hspp An experimental library to bring Haskell Style Programming to C++. Apache-2.0 header-only IP-DOS (tm) IdeaFarm (tm) Piggyback Distributed Operating System: A general purpose programming environment for the C++ language. Proprietary Open Source Open Watcom 2.0 JUCE An extensive, mature, cross-platform C++ toolkit GPL Kangaru A dependency injection container for C++11 and C++14 MIT Kerbal Backports of modern STL facilities to previous standard. More features! More constexpr! LGPL-3.0 header-only; cmake libsourcey A cross-platform C++14 library for high speed networking and media encoding. HTTP, WebSockets, TURN, STUN, Symple and more. LGPL-2.1 cmake LLNL/units A run-time C++ library for working with units of measurement and conversions between them and with string representations of units and measurements BSD 3-Clause "New" or "Revised" cmake Loki A C++ library of designs, containing flexible implementations of common design patterns and idioms. MIT make match(it) A lightweight pattern-matching library for C++17 with macro-free APIs. Apache-2.0 header-only nonstd-lite A list of *-lite repositories (e.g., span-lite, scope-lite, expected-lite) containing C++98/11 implementations of some of the proposed or already standardized C++17/20/23 library types, such as std::span, std::expected etc). BSL-1.0 header-only nytl A generic C++17 utility template library. BSL-1.0 header-only OnPosix C++ library providing several abstractions (e.g., threading, networking, logging, IPC, etc.) on POSIX platforms. Reason XML, xpath, regex, threads, sockets, HTTP, SQL, date-time, streams, encoding and decoding, filesystem, compression GPL SaferCPlusPlus A safe compatible substitutes for unsafe C++ primitives, including pointers, int and std::vector. Boost Smart Enum to_string, from_string and more for your enums. BSL-1.0 cmake units A compile-time dimensional analysis and unit conversion library built on c++14 with no dependencies MIT header-only yaal Yet Another Abstraction Layer - algorithms, collections, arbitrary precision calculation, generic-DSL grammar driven parsers and more CC BY-ND-NC 4.0 cmake Yato A modern C++(14/17) cross-platform STL-styled and STL-compatible library with implementing containers, ranges, iterators, type traits and other tools; actors system; type-safe config interface. Apache-2.0 cmake yomm2 An open multi-methods for C++17 Boost zoolib ZooLib is a feature rich C++ toolkit. MIT Library Description License Configuration Brisk Cross-platform C++20 modular GUI framework, with reactive capabilities, and scalable, GPU-accelerated rendering. (Src), (Doc) GPL2+/Proprietary cmake, vcpkg Dear ImGui A lightweight GUI library for C++ with minimal dependencies, portable, render-agnostic, optimized for use in 3D-pipeline-enabled apps. MIT vcpkg FLTK A cross-platform C++ GUI toolkit (Linux, Windows, MacOS) that provides modern GUI functionality, and supports 3D graphics via OpenGL/GLUT. Designed to be small and modular. Includes an UI builder. LGPL ver.2 nana Cross-platform GUI programming in modern C++ style. (Src), (Doc) BSL-1.0 cmake, vcpkg nanogui A minimalistic cross-platform widget library for OpenGL 3.x or higher (Doc) OWLNext Modern update to OWL for writing GUI applications in standard C++ on Windows Slint A declarative GUI toolkit to build native user interfaces for desktop, embedded, and microcontrollers. (Src), (Doc) GPL 3, Royalty-free, or Commercial cmake tiny file dialogs A set of C/C++ cross-platform file dialogs (no init, no main loop, 6 modal function calls) header-only U++ A cross-platform (Windows, GNU/Linux, macOS) rapid application development framework with bundled IDE. C++17 Compatible. (Doc) (Src) BSD-3-Clause make WxWidgets A free and open-source cross-platform (Windows, GNU/Linux, macOS) C++ framework for writing advanced GUI applications using native controls. (Doc) Modified LGPL cmake, make xtd A modern C++17/20 framework to create console, GUI and unit tests applications on Windows, macOS, Linux, iOS, and Android. (Src) (Doc) MIT cmake Library Description License Configuration bgfx A powerful cross-platform (Windows, Mac, Linux, iOS, Android, Web) 2D/3D graphics rendering shader-aware library with rendering backends: DX, OpenGL, Metal, WebGL, Vulkan etc. (Doc) BSD-2 make cairomm A C++ wrapper for the cairo graphics library that is 2D library with support for multiple output devices: X Window, Quartz, Win32, image buffers, PostScript, PDF, SVG, OpenGL (experimental). LGPL dfpsr A 2D, 3D and isometric software renderer with desktop GUI toolkit, minimalistic dependency, designed for long time maintenance and can run without any 3D accelerated drivers zlib gegl Generic Graphics Library (GEGL) is a data flow based image processing framework, providing floating-point processing and non-destructive image processing capabilities. (Src) LGPL io2d A reference implementation of P0267, the proposed 2D graphics API for ISO C++ BSL-1.0 cmake nanovg An antialiased 2D vector drawing library in C on top of OpenGL for UI and visualizations, with ports to DX11/Metal/bgfx. zlib nux An OpenGL toolkit LGPL v3 pangomm The official C++ interface for the Pango font layout library. (Src) LGPL v2.1 make Skia An open-source 2D-graphics library written in C++. Skia Graphics Engine is used in Google Chrome, Chrome OS, Mozilla Firefox, Android, LibreOffice, Flutter, etc. Skia has several back-ends: software rasterization, (PDF) output, OpenGL, SVG, etc. New BSD TXLib TX Library is a tiny 2D graphics library for Win32 written in C++. ULIS A cross-platform C++14 library for generic digital image processing, 2D software rasterizer, unlimited image formats (u8, u16, u32, float, double), Custom bit-ordered memory layout, All Photoshop pixel blending modes + 11 additional modes, Color models (RGB, HSL, HSV, CMYK, ...), Color-managed pipelines, Color Space support (icm profiles and device-independant), Optimized algorithms with multithreading, Optimized algorithms with SIMD Extensions (SSE2), Image pools and caches for optimisations, Memory storage of animated image sequences. Custom (free-of-charge for non-commercial purposes only) cmake Library Description License Configuration assimp 3D model loading BSD-3 cmake, vcpkg bgfx A cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library. BSD-2 make, vcpkg Diligent Engine A modern cross-platform low-level 3D graphics library. Apache-2.0 cmake Epoxy A modern successor to GLEW. Abstracts difference between some kinds of GL contexts, which makes it sometimes simpler to use than GLEW. Used by GTK+ project since 2015. MIT meson, vcpkg G3D The G3D Innovation Engine is a fully featured, open-source, cross-platform (Windows, Linus, Mac OS) 3D game engine written in C/C++. G3D is used in commercial games, research papers, simulators, and university courses. It supports real-time and offline hardware rendering, ray tracing, model loading, linear algebra, and GP-computation on GPUs. Supports 3DS, OBJ, MP4, PNG, JPG, MD3 and many other formats, includes a native OpenGL skinnable GUI. (Src) (Doc) BSD-2 GLAD A customizable, lightweight library for loading OpenGL functions GLEW An OpenGL functions loader (Src) EXTGL/BSD/MIT make, vcpkg GLFW An OpenGL window manager (Src) (Doc) zlib/libpng cmake, vcpkg GLM The OpenGL Mathematics (GLM) is a C++ mathematics library for graphics software based on GLSL spec. The Happy Bunny /libmicrohttpd to provide a simple API for developers to create HTTP services in C++. LGPL-v2.1 autotools libkcddb liblastfm libmusicbrainz5 libnavajo Molybden An SDK for building cross-platform C++ desktop apps with HTML/CSS/JS GUI. (Doc) (Src) License npm oatpp A powerful portable lightweight and zero-dependency web-framework for IoT and high-performance web-services. QtWebApp HTTP(s) Server in C++ inspired by Java Servlets Tufão An asynchronous web framework for C++11 built on top of Qt (Doc) LGPL-2.1, GPL-2.0 cmake uri-template URI Templates expansion and reverse-matching for C++ Apache 2.0 cmake userver The C++ Asynchronous Framework Apache 2.0 cmake Wt Widgets and building blocks for web apps, built-in security, PDF rendering, 2D and 3D painting, ORM, charting, authentication frameworks. (Doc) (Src) GNU GPL or Commercial
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