Open-source cpp software
3521 open-source libraries, tools and applications tagged cpp, ranked by how closely cpp is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
3521 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| Tink Tink is a multi-language, cross-platform open source cryptographic library from Google that provides secure, easy-to-use APIs for encryptio… | 10 | 13538 | maintenance |
| LeelaChessZero/lc0 Lc0 is an open-source, UCI-compliant chess engine that plays chess using neural networks trained via AlphaZero-style self-play reinforcemen… | 74 | 3248 | active |
| onnx/onnx-tensorrt A C++ parser library and backend that converts ONNX models into TensorRT engines for high-performance GPU inference. It is maintained by NV… | 91 | 3238 | active |
| NVIDIAGameWorks/Falcor Falcor is NVIDIA's open-source real-time rendering framework for rapid prototyping of graphics research, built on DirectX 12 and Vulkan. It… | 86 | 3237 | active |
| Jittor/jittor Jittor is a high-performance deep learning framework from Tsinghua University based on just-in-time (JIT) compilation and meta-operators, w… | 68 | 3237 | active |
| facebook/igl Facebook's Intermediate Graphics Library (IGL) is a cross-platform C++ library that provides a single low-level interface for commanding th… | 72 | 3236 | active |
| sharkdp/dbg-macro A single-header C++ library providing a dbg(…) macro for quick printf-style debugging. It prints file, line, function, expression, value, a… | 49 | 3234 | stable |
| PJLab-ADG/SensorsCalibration OpenCalib is a C++ multi-sensor calibration toolbox for autonomous driving that calibrates IMU, LiDAR, camera, and radar sensors, both intr… | 32 | 3228 | active |
| ThirteenAG/WidescreenFixesPack A collection of ASI plugins that add or improve widescreen resolution support in classic PC games, fix bugs, and add extra features. It cov… | 78 | 3224 | active |
| DISTRHO/Cardinal Cardinal is a free, open-source virtual modular synthesizer based on VCV Rack, packaged as a self-contained audio plugin (AudioUnit/CLAP/LV… | 70 | 3220 | stable |
| CosmosOS/Cosmos Cosmos is an operating system construction kit that lets developers build bare-metal OS kernels using .NET languages like C#, VB.NET, and F… | 99 | 3217 | active |
| VTK VTK (Visualization Toolkit) is an open-source C++ library for 3D graphics, image processing, volume rendering, and scientific visualization… | 77 | 3215 | stable |
| bloomberg/blazingmq BlazingMQ is a distributed, high-performance message queuing system written in C++, providing durable, fault-tolerant queues with rich rout… | 73 | 3215 | stable |
| The-OpenROAD-Project/OpenROAD OpenROAD is an open-source application implementing a unified RTL-to-GDSII flow for digital chip design, covering synthesis through floorpl… | 68 | 3213 | active |
| polardb/PolarDB-for-PostgreSQL PolarDB for PostgreSQL is a cloud-native, PostgreSQL-compatible database system developed by Alibaba Cloud. It uses a shared-storage archit… | 91 | 3205 | active |
| Arm NN Arm's Compute Library is a C++ collection of over 100 low-level machine learning and computer vision functions optimized for Arm Cortex-A/N… | 98 | 3197 | active |
| PanosK92/SpartanEngine Spartan Engine is a C++ game engine built over 12+ years by a single developer, featuring a fully bindless, GPU-driven renderer with real-t… | 86 | 3190 | active |
| magiblot/tvision A modern cross-platform port of Borland's Turbo Vision 2.0, the classic C++ framework for building text-based user interfaces. It preserves… | 67 | 3190 | active |
| Faust Faust (Functional Audio Stream) is a functional programming language for real-time digital signal processing and sound synthesis, developed… | 96 | 3188 | stable |
| Ender3 V2/S1 Firmware Optimized Marlin-based firmware for Creality Ender 3 V2 and S1 3D printers, with precompiled binaries for STM32 RET6/RCT6 boards. It adds f… | 72 | 3184 | active |
| DynamoRIO/dynamorio DynamoRIO is a runtime code manipulation system that supports arbitrary code transformations on executing programs, with a powerful instruc… | 95 | 3181 | active |
| Quickshell Quickshell is a toolkit for building desktop shell components such as status bars, widgets, lockscreens, and display managers using QtQuick… | 89 | 3173 | active |
| Sergio0694/ComputeSharp ComputeSharp is a .NET library that lets developers write compute and pixel shaders in C# and run them in parallel on the GPU via DirectX 1… | 73 | 3173 | stable |
| NASA-SW-VnV/ikos IKOS is a static analyzer for C and C++ programs based on the theory of Abstract Interpretation, built on LLVM. It provides reusable abstra… | 57 | 3166 | active |
| Tencent/Tendis Tendis is a high-performance distributed key-value storage system fully compatible with the Redis protocol, built on RocksDB for disk-based… | 81 | 3165 | active |
| ttttupup/wxhelper wxhelper is a C++ DLL that hooks the Windows PC WeChat client, exposing its internal functions through a local HTTP server (default port 19… | 58 | 3164 | active |
| T-vK/ESP32-BLE-Keyboard An Arduino-compatible C++ library that turns an ESP32 into a Bluetooth LE (BLE) keyboard. It lets sketches send keystrokes, text, individua… | 23 | 3163 | active |
| easymodo/qimgv qimgv is a fast, lightweight desktop image viewer built with Qt, featuring optional video playback via libmpv. It offers a minimal unclutte… | 48 | 3147 | active |
| seladb/PcapPlusPlus PcapPlusPlus is a multiplatform C++ library for capturing, parsing, and crafting network packets. It wraps popular packet processing engine… | 83 | 3144 | stable |
| SeekDB seekdb is an AI-native search database from OceanBase that unifies relational, vector, full-text, JSON, and GIS data in a single MySQL-comp… | 78 | 3142 | active |
| zrythm/zrythm Zrythm is a free, cross-platform digital audio workstation (DAW) for recording, editing, mixing, and producing music with audio and MIDI. I… | 67 | 3141 | active |
| ETLCPP/etl The Embedded Template Library (ETL) is a C++ library providing STL-like containers, algorithms, and utilities designed for embedded systems… | 97 | 3139 | active |
| Tilck Tilck is a tiny educational Linux-compatible kernel written in C and assembly, targeting i386 and riscv64 with UEFI boot support. It implem… | 75 | 3132 | active |
| Gemini Watermark Tool A C++20 tool that detects and removes the Gemini/Nano Banana Pro and Veo watermarks from AI-generated images using calibrated reverse alpha… | 74 | 3124 | active |
| wolfcw/libfaketime libfaketime is an LD_PRELOAD library that intercepts system calls retrieving the current date and time, reporting faked times to a single a… | 85 | 3122 | active |
| OpenVINS OpenVINS is an open-source C++ platform for visual-inertial navigation research, centered on a filter-based (MSCKF/EKF) estimator that fuse… | 44 | 3121 | active |
| BinomialLLC/basis_universal Basis Universal is an open-source LDR/HDR GPU supercompressed texture codec and transcoding system supporting .KTX2 and .basis file formats… | 93 | 3120 | active |
| simd-everywhere/simde SIMDe is a header-only C/C++ library providing portable implementations of SIMD intrinsics (SSE, AVX, NEON, AltiVec, etc.) on hardware that… | 74 | 3115 | active |
| FFTW/fftw3 FFTW is a widely used C library for computing discrete Fourier transforms (DFTs), known for its speed and adaptive code generation. This re… | 58 | 3108 | stable |
| GZDoom GZDoom is a modder-friendly source port of the Doom engine supporting all Doom engine games, with modern OpenGL and Vulkan renderers and a … | 70 | 3107 | active |
| lammps/lammps LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) is an open-source classical molecular dynamics simulation code focused o… | 95 | 3104 | stable |
| acl-dev/acl Acl is a cross-platform C/C++ network communication library and server programming framework supporting Linux, Windows, macOS, FreeBSD, And… | 86 | 3103 | stable |
| mangos/MaNGOS MaNGOS is an open-source MMORPG server emulation project, originally announced in 2005, that implements game server software for older vers… | 60 | 3103 | active |
| b4rtaz/distributed-llama A C++ application that connects multiple home devices into a cluster for distributed LLM inference using tensor parallelism. It supports Ll… | 74 | 3100 | active |
| TensorFlow Lite for Microcontrollers TensorFlow Lite for Microcontrollers (TFLM) is a C++ port of TensorFlow Lite for running ML models on microcontrollers, DSPs, and other mem… | 76 | 3098 | active |
| facebook/wangle Wangle is a C++ networking library providing composable client/server abstractions for building protocols, application clients, and servers… | 95 | 3093 | active |
| ColinDuquesnoy/QDarkStyleSheet A dark and light stylesheet/theme library for Qt applications, supporting PyQt and PySide bindings (Qt5/Qt6) in Python as well as C++. It p… | 34 | 3088 | active |
| Mod Organizer 2 Mod Organizer 2 is a Windows desktop application for managing mod collections of arbitrary size for PC games like Skyrim and Fallout 4. It … | 60 | 3082 | active |
| qt-creator/qt-creator Qt Creator is a cross-platform integrated development environment (IDE) built by the Qt project for developing applications in C++ (and oth… | 97 | 3078 | active |
| PixarAnimationStudios/OpenSubdiv OpenSubdiv is a set of open-source C++ libraries implementing high-performance subdivision surface evaluation on massively parallel CPU and… | 76 | 3075 | stable |
| zxingify/zxingify-objc ZXingObjC is a full Objective-C port of the ZXing barcode image processing library, supporting encoding and decoding of many 1D and 2D barc… | 23 | 3074 | active |
| widelands/widelands Widelands is a free, open-source real-time strategy game inspired by Settlers II, featuring singleplayer campaigns and multiplayer modes. I… | 75 | 3072 | active |
| liboqs liboqs is an open source C library providing implementations of quantum-resistant (post-quantum) key encapsulation mechanisms and digital s… | 85 | 3071 | active |
| microsoft/plcrashreporter PLCrashReporter is an open-source in-process crash reporting library for iOS, macOS, and tvOS written in Objective-C. It detects crashes an… | 56 | 3069 | stable |
| bshoshany/thread-pool BS::thread_pool is a fast, lightweight, header-only C++17/C++20/C++23 thread pool library for submitting tasks to a pool of worker threads … | 52 | 3064 | stable |
| stephenberry/glaze Glaze is an extremely fast, header-only C++ serialization and reflection library supporting JSON, BEVE, CBOR, BSON, CSV, MessagePack, TOML,… | 94 | 3061 | active |
| KiCad/kicad-source-mirror KiCad is a cross-platform open-source EDA (Electronic Design Automation) suite for designing printed circuit boards and schematics, includi… | 95 | 3060 | active |
| limbonaut/limboai LimboAI is an open-source C++ plugin for Godot Engine 4 that provides Behavior Trees and Hierarchical State Machines for building game AI. … | 93 | 3059 | active |
| imgui-rs/imgui-rs imgui-rs provides safe Rust bindings to Dear ImGui, the standard immediate-mode GUI library. It includes a high-level safe API crate, gener… | 59 | 3059 | active |
| OpenBoard-org/OpenBoard OpenBoard is an open-source cross-platform interactive whiteboard application designed primarily for classroom use in schools and universit… | 86 | 3057 | active |
| Wayfire Wayfire is a modular and extensible 3D Wayland compositor built on wlroots, inspired by Compiz. It provides a customizable, lightweight des… | 85 | 3055 | active |
| FNA-XNA/FNA FNA is an accuracy-focused reimplementation of the Microsoft XNA Game Studio 4.0 Refresh libraries for open desktop platforms. It lets XNA … | 99 | 3053 | active |
| projectchrono/chrono Project Chrono is a high-performance, open-source C++ multiphysics simulation library for multibody dynamics, finite element analysis, gran… | 77 | 3053 | stable |
| project64/project64 Project64 is a free, open-source Nintendo 64 and 64DD emulator written in C++ for Windows. It plays N64 games with high-definition graphics… | 75 | 3047 | active |
| benhoyt/inih inih (INI Not Invented Here) is a small, simple .INI file parser written in C, designed to be just a couple pages of code. It parses INI fi… | 73 | 3045 | stable |
| contour-terminal/contour Contour is a modern, GPU-accelerated terminal emulator written in C++23 for everyday use by power users. It offers advanced features such a… | 88 | 3044 | active |
| simplefoc/Arduino-FOC SimpleFOC is an Arduino/PlatformIO C++ library implementing Field Oriented Control (FOC) for BLDC and stepper motors. It supports many moto… | 71 | 3042 | active |
| Snapchat/KeyDB KeyDB is a multithreaded, high-performance fork of Redis that is fully protocol-compatible and acts as a drop-in replacement for Redis depl… | 23 | 12505 | maintenance |
| odygrd/quill Quill is an ultra-low-latency asynchronous logging and metrics library for C++17. It is designed for performance-critical applications wher… | 95 | 3032 | active |
| Alinshans/MyTinySTL A C++11 reimplementation of a large portion of the C++ Standard Template Library, including containers, iterators, and algorithms. Original… | 23 | 12474 | maintenance |
| LibrePCB/LibrePCB LibrePCB is a free, open-source electronic design automation (EDA) suite for drawing schematics and designing printed circuit boards. It ru… | 89 | 3024 | active |
| DescentDevelopers/Descent3 The open-sourced Descent 3 game engine by Outrage Entertainment, released under GPL-3.0 and maintained by the Descent community. It require… | 59 | 3016 | active |
| google/mozc Mozc is an open-source Japanese Input Method Editor (IME) originating from Google Japanese Input, released under a BSD license. It supports… | 77 | 3015 | active |
| pytorch/TensorRT Torch-TensorRT is a compiler library that accelerates PyTorch model inference on NVIDIA GPUs using TensorRT. It supports just-in-time compi… | 93 | 3009 | active |
| HansKristian-Work/vkd3d-proton vkd3d-proton is a fork of WineHQ's VKD3D that implements the Direct3D 12 API on top of Vulkan. It serves as the D3D12 translation layer use… | 91 | 3005 | active |
| Unity-Technologies/Graphics The public mirror of Unity's Graphics repository containing the Scriptable Render Pipeline (SRP), including the Universal Render Pipeline (… | 76 | 3004 | active |
| vLLM vllm-ascend is a community-maintained hardware plugin that enables vLLM to run large language model inference on Huawei Ascend NPUs. It imp… | 83 | 2996 | active |
| hosseinmoein/DataFrame A high-performance, templatized C++ library providing a heterogeneous DataFrame container for in-memory data exploration, transformation, a… | 95 | 2990 | active |
| microsoft/wil A header-only C++ library from Microsoft providing readable, type-safe C++ interfaces for common Windows coding patterns. It includes RAII … | 73 | 2990 | stable |
| Geode Geode is a fan-made mod loader and modding SDK for Geometry Dash, providing a comprehensive toolkit for creating compatible mods in C++. It… | 100 | 2986 | active |
| ispc/ispc Intel ISPC is a compiler for a C-based SPMD (single program, multiple data) language that targets SIMD vector units on CPUs and GPUs. It le… | 95 | 2985 | stable |
| klee/klee KLEE is a dynamic symbolic execution engine and symbolic virtual machine built on LLVM, which executes programs with symbolic inputs to aut… | 88 | 2985 | active |
| userver-framework/userver userver is a production-ready open-source C++ asynchronous framework with coroutines for building microservices, services, and utilities. I… | 93 | 2982 | stable |
| eteran/edb-debugger edb is a cross-platform AArch32/x86/x86-64 debugger inspired by OllyDbg, built with Qt and Capstone. It provides a graphical interface for … | 67 | 2980 | active |
| Martchus/syncthingtray A tray application and platform integration for Syncthing, providing a tray icon, status menu, and quick actions for the Syncthing file syn… | 96 | 2979 | active |
| GaijinEntertainment/DagorEngine Dagor Engine is the proprietary game engine and toolchain source code from Gaijin Games (creators of War Thunder), released for public use.… | 88 | 2977 | active |
| fairygui/FairyGUI-unity FairyGUI is a cross-platform UI editor and framework for Unity, designed to let designers build interfaces with a designer-oriented workflo… | 48 | 2974 | active |
| google/mozc-devices Google's repository of circuit diagrams and C++ firmware source code for building DIY versions of Gboard novelty keyboards, formerly Google… | 76 | 2970 | active |
| phoboslab/wipeout-rewrite A C re-implementation of the 1995 PlayStation racing game wipEout, playable in the browser via Emscripten or as a native desktop build. It … | 68 | 2969 | active |
| scarsty/kys-cpp A completed C++ remake of the classic Chinese wuxia RPG 'Jin Yong's Heroes' (金庸群侠传), built with SDL3. It supports classic turn-based combat… | 64 | 2969 | stable |
| guillaumeblanc/ozz-animation ozz-animation is an open source C++ 3D skeletal animation library and toolset providing runtime character animation playback (sampling, ble… | 79 | 2967 | stable |
| wolfSSL/wolfssl wolfSSL is a lightweight, portable SSL/TLS library written in ANSI C, supporting TLS 1.3 and DTLS 1.3, powered by the wolfCrypt cryptograph… | 94 | 2961 | stable |
| sherlockchou86/VideoPipe VideoPipe is a C++ framework for video analysis and structuring that works like a pipeline of independent, composable nodes. It integrates … | 50 | 2960 | active |
| mit-nlp/MITIE MITIE is a C++ library and toolset for information extraction, providing named entity recognition and binary relation detection built on dl… | 39 | 2960 | active |
| dalathegreat/Battery-Emulator Battery-Emulator is firmware that lets second-life EV battery packs be reused as stationary home energy storage by translating communicatio… | 94 | 2959 | active |
| li-plus/chatglm.cpp A pure C++ implementation of ChatGLM-6B, ChatGLM2-6B, ChatGLM3, and GLM-4(V) based on ggml, enabling memory-efficient real-time chatting on… | 21 | 2957 | active |
| ValveSoftware/steam-audio Steam Audio is Valve's open-source spatial audio SDK providing physics-based sound propagation, occlusion, reflection, reverb, and HRTF-bas… | 63 | 2956 | active |
| nicklockwood/iCarousel iCarousel is an Objective-C library providing a highly customisable, data-driven 3D carousel (paged scrolling view) for iOS and macOS. It i… | 10 | 12096 | maintenance |
| mozilla/cbindgen cbindgen is a tool that generates C and C++11 header files from Rust crates that expose a public C API. It can be used as a standalone CLI … | 85 | 2951 | active |
| Rust-SDL2/rust-sdl2 Rust bindings for the SDL2 multimedia library, wrapping low-level C APIs in idiomatic Rust. It provides access to graphics, audio, input, a… | 62 | 2951 | active |