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C++ libraries

CLI​

  • cxxopts - Lightweight C++ command line option parser.
  • FTXUI - C++ Functional Terminal User Interface.
  • Command Interface - Add a command-line interface to any C++ program. (HN)
  • Argh - Minimalist argument handler.
  • CLI11 - Command line parser for C++11.
  • libcargs - Command line argument library for C/C++.

Test​

  • Catch2 - Modern, C++-native, header-only, test framework for unit-tests, TDD and BDD - using C++11, C++14, C++17 and later.
  • Google Test - Google Testing and Mocking Framework.
  • utest.h - Single header unit testing framework for C and C++.
  • Mutate - C++ Mutation Test Environment.
  • RapidCheck - C++ framework for property based testing inspired by QuickCheck and other similar frameworks.
  • doctest - Fastest feature-rich C++11/14/17/20 single-header testing framework.
  • UT - C++20 μ(micro)/Unit Testing Framework.
  • Tau - Micro Unit Test Framework for C/C++.

Concurrency​

  • Cpp-Taskflow - Fast C++ header-only library to help you quickly write parallel programs with complex task dependencies.
  • Async++ - Lightweight concurrency framework for C++11.
  • Thrust - C++ parallel programming library which resembles the C++ Standard Library.

UI​

  • Dear ImGui - Bloat-free Immediate Mode Graphical User interface for C++ with minimal dependencies. (Awesome Dear ImGui)
  • giu - Cross platform rapid GUI framework for golang based on Dear ImGui.
  • GuiLite - Smallest UI framework for all platform -- 5K lines code.
  • Yue - Library for creating native cross-platform GUI apps.
  • MyGUI - Fast, flexible and simple GUI.
  • Plywood - Cross-platform framework for building all kinds of C++ software. (HN)
  • Elements - Lightweight, fine-grained, resolution independent, modular GUI library. (HN)
  • wxWidgets - Cross-Platform GUI Library.
  • Fast UI Draw - Library that provides a higher performance Canvas interface. It is designed so that it always draws using a GPU. (HN)

Web​

  • NFHTTP - Cross platform C++ HTTP framework.
  • Drogon - C++14/17-based rapid HTTP and web application framework.
  • Asio - Cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach. (Code)
  • Pistache - High-performance REST Toolkit written in C++.
  • Malloy - C++ library providing embeddable server & client components for both HTTP and WebSocket.
  • Crow - Fast and Easy to use microframework for the web. (Web)
  • Oat++ - Light and powerful C++ web framework for highly scalable and resource-efficient web application. It's zero-dependency and easy-portable.
  • libhttpserver - C++ library for building high performance RESTful web servers.
  • async-sockets-cpp - Simple thread-based asynchronous TCP & UDP Socket classes in C++.
  • mockturtle - C++ logic network library.
  • Wt - C++ Web Toolkit.
  • Beast - HTTP and WebSocket built on Boost.Asio in C++11.

Graphics​

  • Cinder - Peer-reviewed, free, open source C++ library for creative coding. (Web) (Docs) (HN)
  • Terathon Math Library - C++ math library containing classes for vectors, matrices, quaternions, and elements of projective geometric algebra.
  • VGC - Next-Gen Graphic Design and 2D Animation. (Web)
  • Yocto/GL - C++ Libraries for Data-Driven Physically-based Graphics. (Docs) (HN)
  • Methane Kit - Easy to use modern 3D graphics rendering abstraction API and cross-platform application framework.
  • Tahoma2D - 2D and Stop Motion Animation Software. (Web)
  • gfx - Minimalist and easy to use graphics API built on top of Direct3D12/HLSL intended for rapid prototyping.
  • bigger - Prototype-oriented middleware library for 3D interactive applications.
  • Treexy - Brutally fast, sparse, 3D Voxel Grid.
  • neoGFX - Cross-platform GPU-oriented C++ application/game framework. (Web)
  • NanoGUI - Minimalistic C++/Python GUI library for OpenGL, GLES2/3, Metal, and WebAssembly/WebGL.
  • Anti-Grain Geometry - Open Source, 2D vector graphics library. Produces pixel images in memory from vectorial data.
  • JNGL - Easy to use cross-platform 2D game library for C++.
  • libpag - Real-time rendering library for PAG (Portable Animated Graphics) files that renders After Effects animations natively across multiple platforms.
  • Alembic - Open computer graphics interchange framework. (Web)
  • TriMesh2 - C++ library and set of utilities for input, output, and basic manipulation of 3D triangle meshes.
  • Skity - Open-source 2D graphics library written in C++ using OpenGL and Vulkan.
  • OpenMfx - Low-overhead mesh-processing plug-in API for cross-software procedural effects.
  • Mesh2SDF - Converts an input mesh to a signed distance field (SDF).
  • GTSAM - C++ library that implements smoothing and mapping (SAM) in robotics and vision, using Factor Graphs and Bayes Networks.

DB​

  • libpqxx - Official C++ client API for PostgreSQL.
  • SOCI - C++ Database Access Library.
  • taoPQ - C++ client library for PostgreSQL.
  • Velox - C++ vectorized database acceleration library aimed to optimizing query engines and data processing systems.
  • Supersonic - Ultra-fast, column oriented query engine library written in C++.
  • SQLite ORM - Light header only library for modern C++.
  • rocksdb - Pure C++ Node.js RocksDB binding. An abstract-leveldown compliant store.
  • KVDK - Key-value store library implemented in C++ language.
  • silicondb - Concurrent key-value store, column-oriented database and more.

Crypto​

  • OpenABE - Open source cryptographic library with attribute-based encryption implementations in C/C++.
  • Crypto++ - Free C++ class library of cryptographic schemes.
  • AZTEC - C++ elliptic curve library.

ML​

  • ML++ - Library created to revitalize C++ as a machine learning front end.

Math​

  • Eigen - C++ template library for linear algebra. (HN)
  • Stan Math - C++ template library for automatic differentiation of any order using forward, reverse, and mixed modes. It includes a range of built-in functions for probabilistic modeling, linear algebra, and equation solving.

Other​

  • {fmt} - Modern formatting library.
  • simdjson - Parsing gigabytes of JSON per second.
  • nlohmann/json - JSON for Modern C++.
  • Folly - Library of C++14 components designed with practicality and efficiency in mind.
  • jet-live - C++ hot code reload for linux and macos.
  • cpr - Curl for People, a spiritual port of Python Requests.
  • argparse - Argument Parser for Modern C++.
  • lager - C++ library to assist value-oriented design by implementing the unidirectional data-flow architecture.
  • Immutable++ - Persistent immutable data structures providing practically O(1) for appends, updates and lookups.
  • cpp-httplib - C++ single-file header-only cross platform HTTP/HTTPS library.
  • Proxygen - Collection of C++ HTTP libraries including an easy to use HTTP server.
  • RESTinio - Header-only C++14 library that gives you an embedded HTTP/Websocket server.
  • Enoki - Structured vectorization and differentiation on modern processor architectures.
  • Marl - Hybrid thread / fiber task scheduler written in C++ 11.
  • Collection of succinct data structures
  • Microsoft's C++ Standard Library
  • Quantum Library - Full-featured and powerful C++ framework build on top of the Boost coroutine library.
  • Wangle - Framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.
  • Typeclasses in C++ - Future C++ implementation of Rust-like trait objects with no boilerplate.
  • Basic Development Environment - Set of foundational C++ libraries used at Bloomberg.
  • BareMetalLib - C++ support library for bare-metal programming.
  • matplotlib-cpp - Extremely simple yet powerful header-only C++ plotting library built on the popular matplotlib.
  • re2 - Fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python.
  • Boost.Hana - Your standard library for metaprogramming.
  • xtensor - C++ tensors with broadcasting and lazy computing.
  • Choreograph - Simple, modern C++ animation and timing library.
  • cppast - Library to parse and work with the C++ AST.
  • thread-pool-cpp - High performance C++11 thread pool.
  • pytest-cpp - Use pytest's runner to discover and execute C++ tests.
  • MFEM - Lightweight, general, scalable C++ library for finite element methods.
  • Backward-cpp - Beautiful stack trace pretty printer for C++.
  • sparsehash - C++ associative containers.
  • tabulate - Table Maker for Modern C++.
  • stb - Single-file public domain libraries for C/C++.
  • Diligent Engine - Modern cross-platform low-level graphics library and rendering framework.
  • Loguru - Lightweight C++ logging library.
  • DFHack - Dwarf Fortress memory access library, distributed with scripts and plugins implementing a wide variety of useful functions and tools.
  • Tweeny - Inbetweening library designed for the creation of complex animations for games and other beautiful interactive software.
  • Work-Stealing Queue
  • libff - C++ library for finite fields and elliptic curves.
  • REST client for C++
  • SDSL - Succinct Data Structure Library.
  • Acutest - Simple header-only C/C++ unit testing facility.
  • Boost Multiprecision Library - Provides integer, rational, floating-point, complex and interval number types in C++ that have more range and precision than C++'s ordinary built-in types.
  • Sentry SDK for C/C++
  • scnlib - Modern C++ library for replacing scanf and std::istream.
  • Plog - Portable, simple and extensible C++ logging library.
  • Nano - C++ library for developing high-performance applications for macOS, iOS, tvOS, Android, Linux, and Microsoft Windows.
  • span lite - C++20-like span for C++98, C++11 and later in a single-file header-only library.
  • atomic_queue - C++ lock-free queue.
  • RTTR - C++ Reflection Library.
  • lager - C++ library for value-oriented design using the unidirectional data-flow architecture (Redux for C++).
  • Heteroflow - Header-only C++ library to help you quickly write concurrent CPU-GPU programs using task models.
  • GEOS - C++11 library for performing operations on two-dimensional vector geometries.
  • subprocess.h - Simple one header solution to launching processes and interacting with them for C and C++.
  • OpenMesh - Generic and efficient data structure for representing and manipulating polygonal meshes.
  • Skia - Complete 2D graphic library for drawing Text, Geometries, and Images. (Web)
  • nbind - Magical headers that make your C++ library accessible from JavaScript.
  • Fiber Tasking Lib - Library for enabling task-based multi-threading. It allows execution of task graphs with arbitrary dependencies.
  • ozz-animation - Open source c++ skeletal animation library and toolset.
  • sqlpp11 - Type safe embedded domain specific language for SQL queries and results in C++.
  • Tiny Differentiable Simulator - Header-only C++ physics library with zero dependencies.
  • Movable Feast Machine C++ reference implementation and simulator
  • Fastor - Light-weight high performance tensor algebra framework for modern C++.
  • FastNoise - Fast C++ Noise Library.
  • libigl - Simple C++ geometry processing library.
  • Kodiak - C++ library that implements a generic branch and bound algorithm for rigorous numerical approximations.
  • cilantro - Lean and fast C++ library for working with point cloud data, with emphasis given to the 3D case.
  • Frozen - Header-only library that provides 0 cost initialization for immutable containers and various algorithms.
  • fast_io - C++ general-purpose exception-safe RAII I/O library based on C++ 20 Concepts. It is at least ten times faster than cstdio or iostream.
  • LEAF - Lightweight Error Augmentation Framework.
  • nacro - Better C/C++ macro extension. Implemented in Clang plugins. Inspired by Rust's macro system.
  • Magic Enum - Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code.
  • Nameof - Nameof operator for modern C++, simply obtain the name of a variable, type, function, macro, and enum.
  • ALEX - Library for building an in-memory, Adaptive Learned indEX. (HN)
  • cereal - C++11 library for serialization.
  • Boost C++ Libraries
  • ELFIO - Header-only C++ library intended for reading and generating files in the ELF binary format.
  • DataFrame - C++ statistical library that provides an interface similar to Pandas package in Python. (Reddit)
  • structopt - Parse command line arguments by defining a struct. (HN)
  • Derecho - Open-source C++ distributed computing toolkit that provides strong forms of distributed coordination and consistency at RDMA speeds.
  • Jungle - Embedded key-value storage library, based on a combined index of LSM-tree and copy-on-write (append-only) B+tree.
  • NuRaft - C++ implementation of Raft core logic as a replication library.
  • Hyperscan - High-performance multiple regex matching library. (Web)
  • libcu++ - NVIDIA C++ Standard Library.
  • OpenR - Distributed platform for building autonomic network functions.
  • Abseil - Open-source collection of C++ code designed to augment the C++ standard library. (How to contribute to Abseil with a visible performance gain)
  • semver - Semantic Versioning for modern C++.
  • Aleph - Library for Exploring Persistent Homology.
  • Terminal - Small header only C++ library for writing multiplatform terminal applications.
  • Draco - Object-oriented component library geared towards numerically intensive, radiation (particle) transport applications built for parallel computing hardware.
  • cpu_features - Cross platform C99 library to get cpu features at runtime.
  • VSTGUI - User interface toolkit mainly for audio plug-ins.
  • libunifex - Prototype implementation of the C++ sender/receiver async programming model.
  • random - Random for modern C++ with convenient API.
  • fifo_map - FIFO-ordered associative container for C++.
  • TensorRT - C++ library for high performance inference on NVIDIA GPUs and deep learning accelerators.
  • Hnswlib - Header-only C++/python library for fast approximate nearest neighbors.
  • Non-Metric Space Library (NMSLIB) - Efficient similarity search library and a toolkit for evaluation of k-NN methods for generic non-metric spaces.
  • Dyno - Runtime polymorphism done right.
  • Geometry Central - Applied 3D geometry in C++, with a focus on surface meshes. (Docs)
  • Bullet Physics SDK - Real-time collision detection and multi-physics simulation for VR, games, visual effects, robotics, machine learning etc.
  • lexy - C++ parser combinator library.
  • PEGTL - Parsing Expression Grammar Template Library. Zero-dependency C++ header-only parser combinator library for creating parsers according to a Parsing Expression Grammar (PEG).
  • incbin - Include binary files in C/C++.
  • uDepot - Multi-threaded, scalable, persistent store that is flash optimized by using a log-structured space allocation and GC framework.
  • PDAL - Point Data Abstraction Library. GDAL for point cloud data. (Docs)
  • painless - Header-only C++ library that provides an easy way to use interactive parameters in your program.
  • Embedded Template Library (ETL) (Web)
  • C++ B-tree - Modern C++ B-tree containers.
  • Blitz++ - Multi-Dimensional Array Library for C++.
  • ATen - TENsor library for C++11.
  • AsyncFuture - Use QFuture like a Promise object.
  • concurrencpp - C++ concurrency library.
  • Build→It - Type based library framework for multi-stage imperative programming. (Web)
  • FLANN - Fast Library for Approximate Nearest Neighbors.
  • TVLLib - Template Vector Library.
  • Ceres Solver - Open source C++ library for modeling and solving large, complicated optimization problems. (Docs)
  • sdbus-c++ - High-level C++ D-Bus library for Linux designed to provide expressive, easy-to-use API in modern C++.
  • DGtal - Digital Geometry Tools and Algorithm Library. (Web)
  • libpy - Library to help you write amazing Python extensions in C++.
  • cppcoro - Library of C++ coroutine abstractions for the coroutines TS.
  • DynaMix (Dynamic Mixins) - New take on polymorphism. It lets the user compose and modify polymorphic objects at run time in C++.
  • maths - Linear algebra library with vector swizzling, intersection tests and useful functions for games and graphics dev.
  • Edlib - Lightweight, super fast C/C++ (& Python) library for sequence alignment using edit (Levenshtein) distance.
  • Corrade - C++11/C++14 multiplatform utility library. (Web)
  • Vineyard - In-memory immutable data manager. (Docs) (HN)
  • Dionysus - Library for computing persistent homology.
  • Parallel Hashmap - Family of header-only, very fast and memory-friendly hashmap and btree containers.
  • Kimera - C++ library for real-time metric-semantic simultaneous localization and mapping.
  • libtensor - C++ library for tensor computations.
  • RadixSpline - Read-only learned index structure that can be built in a single pass over sorted data.
  • Minisketch - Optimized library for BCH-based set reconciliation.
  • TiledArray - Massively-parallel, block-sparse tensor framework written in C++.
  • FBGEMM - Low-precision, high-performance matrix-matrix multiplications and convolution library for server-side inference.
  • Cista++ - Simple C++ Serialization & Reflection. (Web)
  • Memkind - User extensible heap manager built on top of jemalloc which enables control of memory characteristics and a partitioning of the heap between kinds of memory. (Web)
  • FunctionalPlus - Functional Programming Library for C++. Write concise and readable C++ code.
  • polylabel - Fast algorithm for finding the pole of inaccessibility of a polygon (in JavaScript and C++).
  • GBDT - High performance and full featured C++ implementation of Jerome H. Friedman's Gradient Boosting Decision Trees Algorithm and its modern offsprings.
  • DSPatch - Refreshingly Simple C++ Dataflow Framework.
  • libcuckoo - High-performance, concurrent hash table.
  • libmprompt - Robust multi-prompt delimited control and effect handlers in C/C++.
  • IceCream-Cpp - Little (single header) library to help with the print debugging on C++11 and forward.
  • expected - C++11/14/17 std::expected with functional-style extensions. (Tweet)
  • monolish - MONOlithic Liner equation Solvers for Highly-parallel architecture.
  • EVE - Expressive Velocity Engine.
  • Galois - C++ library designed to ease parallel programming, especially for applications with irregular parallelism.
  • timemory - Timing + Memory + Hardware Counter Utilities for C / C++ / CUDA / Python.
  • Casbin-CPP - Authorization library that supports access control models like ACL, RBAC, ABAC in C/C++.
  • SON-RPC-CXX - JSON-RPC for modern C++.
  • PTHash - Fast and compact minimal perfect hash functions in C++.
  • Zadeh - Blazing fast library for fuzzy filtering, matching, and other fuzzy things.
  • Workflow - C++ Parallel Computing and Asynchronous Networking Engine. (HN)
  • AFF3CT - Fast simulator and a library dedicated to the channel coding. (Web)
  • Boost.Hof - Higher-order functions for C++.
  • aids - std replacement for C++.
  • POCO (Portable Components) - Powerful cross-platform C++ libraries for building network- and internet-based applications that run on desktop, server, mobile, IoT, and embedded systems. (Web)
  • Operon - C++ Large Scale Genetic Programming. (Docs)
  • CppCoro - Library of C++ coroutine abstractions for the coroutines TS.
  • TinyGLTF - Header only C++11 tiny glTF 2.0 library.
  • Pipes - Small components for writing expressive code when working on collections.
  • NamedType - Implementation of strong types in C++.
  • kari.hpp - Experimental library for currying in C++17.
  • cpp-lazy - Fast and easy lazy evaluation library.
  • memory-allocators - Custom memory allocators in C++ to improve the performance of dynamic memory allocation.
  • Vc - Portable, zero-overhead C++ types for explicitly data-parallel programming.
  • cinolib - Generic programming header only C++ library for processing polygonal and polyhedral meshes.
  • ordered-map - C++ hash map and hash set which preserve the order of insertion.
  • CIDLib - General purpose C++ development environment.
  • CrossWindow - Cross platform system abstraction library written in C++ for managing windows and performing OS tasks. (Web)
  • dr_libs - Single file audio decoding libraries for C/C++.
  • EASTL - Alternative C++ Standard Library From Electronic Arts. (HN)
  • Inja - Template Engine for Modern C++. (HN)
  • Reckless - Low-latency, high-throughput, asynchronous logging library for C++.
  • CPP-Libp2p - C++17 implementation of libp2p.
  • µReact - Minimalistic reactive library for c++.
  • Minicore - Fast and memory-efficient clustering + coreset construction, including fast distance kernels for Bregman and f-divergences.
  • EXOTica - Extensible Optimization Framework. (Docs)
  • subprocess - C++ high level library for running shell processes.
  • HOT - Height Optimized Trie.
  • Okasaki - Functional data structures in C++.
  • rlottie - Platform independent standalone library that plays Lottie Animation.
  • simdutf - Unicode validation and transcoding at billions of characters per second. (Talk)
  • Boost.PFR - std::tuple like methods for user defined types without any macro or boilerplate code.
  • double-conversion - Efficient binary-decimal and decimal-binary conversion routines for IEEE doubles.
  • FastNoise2 - Modular node graph based noise generation library using SIMD, C++17 and templates.
  • TensorPipe - Tensor-aware point-to-point communication primitive for machine learning.
  • Rotor - Event loop friendly C++ actor micro framework.
  • optional - Single header implementation of std::optional with functional-style extensions and support for references.
  • ZAB - Asynchronous framework for building event-driven, multi-threaded programs.
  • Ensmallen - High-quality C++ library for non-linear numerical optimization. (Web) (Docs) (HN)
  • Fleet - C++ library for programming language of thought models.
  • MatX - Efficient C++17 GPU numerical computing library with Python-like syntax.
  • oneMKL - Open-source implementation of the oneMKL Data Parallel C++ (DPC++) interface according to the oneMKL specification.
  • mathiu.cpp - Simple computer algebra system in C++.
  • Avendish - Declarative, non-intrusive, compile-time C++ reflection.
  • libossia - Modern C++, cross-environment distributed object model for creative coding.
  • RtAudio - Set of C++ classes that provide a common API for real time audio input/output.
  • RtMidi - Set of C++ classes that provide a common API for real time MIDI input/output.
  • HPX - C++ Standard Library for Parallelism and Concurrency.
  • agrpc - Async GRPC with C++20 coroutine support.
  • Marius - Large scale embeddings on a single machine.
  • Compute Library - Set of computer vision and machine learning functions optimised for both Arm CPUs and GPUs using SIMD technologies.
  • ahsohtoa - Structure-of-array synthesis in C++20.
  • LIEF - Library to Instrument Executable Formats.
  • AStarix - Fast and Optimal Sequence-to-Graph Aligner.
  • dtl - Diff template library written by C++.
  • TinyFSM - Simple C++ finite state machine library.
  • Tongrams - C++ library providing fast language model queries in compressed space.
  • Autocomplete - Efficient and effective query auto-completion in C++.
  • Sexpresso - C++ centric s-expression parser library.
  • baidu-allreduce - Small C++ library, demonstrating the ring allreduce and ring allgather techniques.
  • HIP - C++ Heterogeneous-Compute Interface for Portability.
  • SMACC - Event-driven, asynchronous, behavioral state machine library for real-time ROS (Robotic Operating System) applications written in C++.
  • refl-cpp - Modern compile-time reflection library for C++ with support for overloads, templates, attributes and proxies.
  • NymphRPC - Compact, C++-based Remote Procedure Call (RPC) library.
  • libgo - Go-style concurrency in C++11.
  • xatlas - Mesh parameterization / UV unwrapping library.
  • ohm - Efficient, extensible occupancy map supporting probabilistic occupancy, normal distribution transforms in CPU and GPU.
  • Flecs - Fast entity component system (ECS) for C & C++.
  • Caches - C++ cache with LRU/LFU/FIFO policies implementation.
  • SML - C++14 State Machine Library.
  • Kokkos - Programming model in C++ for writing performance portable applications targeting all major HPC platforms.
  • CPPItertools - Range-based for loop add-ons inspired by the Python builtins and itertools library.
  • libs - Single-file public domain libraries for C/C++.
  • asyncio - C++20 library to write concurrent code using the async/await syntax.
  • CTPG - C++ Compile Time Parser Generator. (HN)
  • Binlog - High performance C++ log library to produce structured binary logs.
  • robin-hood-hashing - Fast & memory efficient hashtable based on robin hood hashing for C++.
  • ParlayLib - Toolkit for Programming Parallel Algorithms on Shared-Memory Multicore Machines.
  • YACLib - C++ library for concurrent tasks execution. (Docs)
  • triSYCL - Generic system-wide modern C++ for heterogeneous platforms with SYCL from Khronos Group.
  • Xcdat - Fast compressed trie dictionary library.
  • Poplar-trie - C++17 implementation of memory-efficient dynamic tries.
  • eraft - Generic raft library inspired etcd in C++.
  • cpp-subprocess - Subprocessing with modern C++.
  • CPP-JWT - JSON Web Token library for C++.
  • libkdtree++ - C++ template container implementation of k-dimensional space sorting, using a kd-tree.
  • promise-cpp - C++ promise/A+ library in JavaScript style.
  • cocoyaxi - Go-style coroutine library in C++11 and more. (Lobsters)
  • ConcurrentQueue - Fast multi-producer, multi-consumer lock-free concurrent queue for C++11.
  • Ratas - Hierarchical timer wheel, for implementing timed event queues.
  • Vectorscan - Portable fork of the high-performance regular expression matching library.
  • Jinja2С++ - C++ implementation of the Jinja2 Python template engine.
  • AMadeus - Collection of high performance C++ containers that can be chosen as drop-in replacements for std::vector and std::set.
  • json2cpp - Compiles JSON into static constexpr C++ data structures with nlohmann::json API.
  • RAJA - Enables architecture and programming model portability for HPC applications.
  • cpp-sort - Sorting algorithms & related tools for C++14.
  • sol2 - C++ library binding to Lua.
  • KDBindings - Reactive programming & data binding in C++.
  • alpaka - Abstraction Library for Parallel Kernel Acceleration.
  • cpp-effects - Effect handlers in C++.
  • nanobench - Simple, fast, accurate single-header microbenchmarking functionality for C++.
  • Multi-Protocol SPDZ - Software to benchmark various secure multi-party computation (MPC) protocols such as SPDZ, SPDZ2k, MASCOT, Overdrive, BMR garbled circuits, Yao's garbled circuits.
  • minicsv - C++ Minimalistic CSV Streams.
  • two - C++ toolkit for rapid development of live graphical apps and games.
  • fast_io - Significantly faster input/output for C++20.
  • nanobind - Seamless operability between C++17 and Python.
  • thread-pool - Simple, functional thread pool implementation using pure C++20.
  • Maat - Open-source symbolic execution framework.
  • mp-units - Compile-time enabled Modern C++ library that provides compile-time dimensional analysis and unit/quantity manipulation.
  • CTTI - Compile Time Type Information for C++.
  • Junction - Concurrent data structures in C++.
  • loop_tool - Thin, highly portable toolkit for dense loop-based computation.
  • fixed_string - C++17 string with fixed size.
  • async_simple - Simple, Light-Weight Asynchronous C++ Framework.
  • Universal - Header-only C++ template library for universal number arithmetic.
  • LodePNG - PNG encoder and decoder in C and C++.
  • PoseLib - Minimal solvers for calibrated camera pose estimation.
  • TOML++ - Header-only TOML config file parser and serializer for C++17.
  • Easy3D - Lightweight, easy-to-use, and efficient C++ library for processing and rendering 3D data.
  • rangeless - Library of higher-order functions for data manipulation.
  • OpenDHT - Lightweight C++17 Distributed Hash Table implementation.
  • Kokkos - C++ Performance Portability Programming EcoSystem: Math Kernels - Provides BLAS, Sparse BLAS and Graph Kernels.
  • BOUT++ - Framework for writing fluid and plasma simulations in curvilinear geometry.
  • HiGHS - Linear optimization software.
  • Voro++ - Three-dimensional Voronoi cell library in C++.
  • SimpleBLE - C++ fully cross-platform BLE library designed for simplicity and ease of use.
  • zstr - C++ header-only ZLib wrapper.
  • uvw - Header-only, event based, tiny and easy to use libuv wrapper in modern C++ - now available as also shared/static library.
  • nanoprintf - Smallest public printf implementation for its feature set.
  • fgt - Fast Gauss transforms.
  • Coherent Point Drift (CPD) - C++ implementation of the Coherent Point Drift point set registration algorithm.
  • lex - C++ library for Lua style pattern matching.
  • ADVobfuscator - Obfuscation library based on C++11/14 and metaprogramming.
  • manif - Small C++11 header-only library for Lie theory.
  • sse4-strstr - SIMD-friendly algorithms for substring searching.
  • Chrono - High-performance C++ library for multiphysics and multibody dynamics simulations.
  • xorstr - Heavily vectorized c++17 compile time string encryption.
  • transwarp - Header-only C++ library for task concurrency.
  • Serdepp - C++ serialize and deserialize adaptor library like rust serde.rs.
  • KelCoro - C++20 coroutine library.
  • Eventuals - C++ library for writing asynchronous computations out of continuations.
  • Albany - Implicit, unstructured grid, finite element code for the solution and analysis of multiphysics problems.
  • match(it) - Lightweight header-only pattern-matching library for C++17 with macro-free APIs.
  • libassert - Most over-engineered and overpowered C++ assertion library.
  • MIPP - Portable and Open-source wrapper for vector intrinsic functions (SIMD) written in C++11.
  • Flat - Flat containers for C++.
  • AnyAny - C++20 library for comfortable and efficient dynamic polymorphism.
  • RxCpp - Reactive Extensions for C++.
  • userver - C++ Asynchronous Framework. (Web) (HN)
  • Dash - Persistent memory friendly hashing index.
  • Crab - C++ Library for Building Program Static Analyses.
  • HFSM2 - High-Performance Hierarchical Finite State Machine Framework.
  • cuCollections - Open-source, header-only library of GPU-accelerated, concurrent data structures.
  • BS::thread_pool - Fast, lightweight, and easy-to-use C++17 thread pool library.
  • Dem Bones - Automated algorithm to extract the linear blend skinning (LBS) from a set of example poses.
  • cubeb - Cross platform audio library.
  • Polygeist - C/C++ frontend for MLIR. Also features polyhedral optimizations, parallel optimizations, and more.
  • hashmap.h - Simple one header hashmap implementation for C/C++.
  • CacheLib - Pluggable in-process caching engine to build and scale high performance services.
  • ztd.text - Premiere library for handling text in different encoding forms and reducing transcoding bugs in your C++ software.
  • uni-algo - Unicode Algorithms Implementation for C/C++.
  • CTAsm - Compile Time Assembler for C++. (Lobsters)
  • hopscotch-map - C++ implementation of a fast hash map and hash set using hopscotch hashing.
  • kdtools - Tools for Working with Multidimensional Data in R and C++.
  • Photon - High-efficiency LibOS framework, based on a set of carefully selected C++ libs.
  • memory - STL compatible C++ memory allocator library using a new RawAllocator concept that is similar to an Allocator but easier to use and write.
  • hspp - Haskell Style Programming brought to C++.
  • fast_float - Fast and exact implementation of the C++ from_chars functions for float and double types: 4x faster than strtod.