MessagePack implementation for C and C++ / msgpack.org[C/C++]

Sorting algorithms & related tools for C++

DoltLite - Version Controlled SQLite

An open-source C++ library developed and used at Facebook.

MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems

C++ ODBC wrapper

A collection of C++ HTTP libraries including an easy to use HTTP server.

Ultra-low-latency asynchronous C++17 logging and metrics library for performance-critical applications

An official lightweight library for the RaBitQ algorithm and its applications in vector search.

Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

A lightweight, lightning-fast, in-process vector database

Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks

Tiny ISO-compliant C++ EXIF and XMP parsing library for JPEG.

A portable fork of the high-performance regular expression matching library

Large collection of number systems providing custom arithmetic for mixed-precision algorithm development and optimization for AI, Machine Learning, Computer Vision, Signal Processing, CAE, EDA, control, optimization, estimation, and approximation.

Modern, fast and ergonomic C++ HTTP/1.1, HTTP/2 and WebSocket server & client library for Linux, macOS and Windows, perfect for microservices.

The project provides high-performance concurrency, enabling highly parallel computation.

An open source C++ game engine.

A C++ header-only YAML library

a pure C++ implementation (& redesign) of libc and the standard library

Tiny XML library.

A small C++ wrapper for the native C ODBC API | Requires C++14 since v2.12

PDFio is a simple C library for reading and writing PDF files.

Protocol Buffers - Google's data interchange format

A production-ready C++ vector graphics engine supporting SVG and Lottie formats, featuring advanced rendering backends such as WebGPU for high-performance graphics.

C++ Faker library for generating fake (but realistic) data.

oneAPI Deep Neural Network Library (oneDNN)

Primary repository for the Trilinos Project

DoltLite - Version Controlled SQLite

Extremely fast, in memory, serialization, reflection, and RPC library for C++. JSON, BEVE, BSON, CBOR, CSV, JSONB, MessagePack, TOML, YAML, EETF

Tensor library for machine learning

Kokkos C++ Performance Portability Programming Ecosystem: The Programming Model - Parallel Execution and Memory Abstraction

C++ modules for scalar, vector and complex math. And maths.

The d-SEAMS C++ core engine

Primary repository for the Trilinos Project

Large collection of number systems providing custom arithmetic for mixed-precision algorithm development and optimization for AI, Machine Learning, Computer Vision, Signal Processing, CAE, EDA, control, optimization, estimation, and approximation.

Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

Seekable lossless compression with O(1) random access, built for ultra-fast decode. Faster than LZ4 (40%+ on ARM64), with better ratios. C library, write-once/read-many.

Generate compile_commands.json for any C or C++ build

C++ Faker library for generating fake (but realistic) data.

Small configuration file parser library for C.

a pure C++ implementation (& redesign) of libc and the standard library

Fast, convenient JSON serialization and parsing in C++

DoltLite - Version Controlled SQLite

The project provides high-performance concurrency, enabling highly parallel computation.

Official doxygen git repository

A few classes for extremely fast json parsing/serializing in modern C++. Possibly the fastest json parser in C++. Possibly the fastest json serializer in C++.

Fully feature complete YAML parser and emitter, supporting the latest YAML spec and passing the full YAML testsuite.

Simple, fast, accurate single-header microbenchmarking functionality for C++11/14/17/20

Large collection of number systems providing custom arithmetic for mixed-precision algorithm development and optimization for AI, Machine Learning, Computer Vision, Signal Processing, CAE, EDA, control, optimization, estimation, and approximation.

Cross-Platform, Efficient easy to integrate crash reporting library for modern C++

ROS 2 sensor fusion SDK: UKF, 3D native, proper GNSS, zero manual tuning. Apache 2.0.

HarfBuzz text shaping engine

Embedded web server, with TCP/IP network stack, MQTT and Websocket

Boost.Multiprecision

Visual Studio Code

Optimized primitives for collective multi-GPU communication

An open-source C++ library developed and used at Facebook.

GoogleTest - Google Testing and Mocking Framework

The missing bridge between Java and native C++

JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, LV2 and AAX audio plug-ins.

an efficient feature complete C++ bittorrent implementation

A collection of C++ HTTP libraries including an easy to use HTTP server.

A fast & densely stored hashmap and hashset based on robin-hood backward shift deletion

Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

C++ Parallel Computing and Asynchronous Networking Framework

A fast float to string algorithm based on schubfach.

A C++ header-only HTTP/HTTPS server and client library

DoltLite - Version Controlled SQLite

A lightweight C++20 serialization and RPC library

A fast & densely stored hashmap and hashset based on robin-hood backward shift deletion

:computer: C++ Functional Terminal User Interface. :heart:

simple neural network library in ANSI C

Minimalistic C client for Redis >= 1.2

The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text.

openFrameworks is a community-developed cross platform toolkit for creative coding in C++.

Seamless operability between C++11 and Python

tiny recursive descent expression parser, compiler, and evaluation engine for math expressions

DoltLite - Version Controlled SQLite

C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!

mimalloc is a compact general purpose allocator with excellent performance.

Up to 100x faster strings for C, C++, CUDA, Python, Rust, Swift, JS, & Go, leveraging NEON, AVX2, AVX-512, SVE, GPGPU, & SWAR to accelerate search, hashing, sorting, edit distances, sketches, and memory ops 🦖

Compact SVO optimized vector for C++17 or higher

Visual Studio Code

LadybugDB a graph database

Arduino libraries, code and applications

Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

🔥 Insanely fast native C++, Swift or Kotlin modules with a statically compiled binding layer to JSI