51 open source projects written in C++
Every C++ project in the registry, ranked by GitHub stars — license and last push on every entry, data pulled live from the GitHub API every night.
llama.cpp ★ 129K Run LLMs locally with minimal setup, maximum hardware support
Godot ★ 117K Free 2D and 3D game engine for cross-platform projects
GPT4All ★ 77K Run open-source AI models privately on your own device
Ladybird ★ 66K An independent browser engine built from scratch, not a fork
ClickHouse ★ 50K Lightning-fast analytics for massive datasets
Zen Browser ★ 44K Privacy-focused browser with powerful customization
duckdb ★ 41K DuckDB is an analytical in-process SQL database management system
serenity ★ 34K The Serenity Operating System 🐞
rocksdb ★ 32K A library that provides an embeddable, persistent key-value store for fast storage.
Fincept Terminal ★ 32K Open-source financial terminal for data-driven insights
Dragonfly ★ 32K Blazing-fast in-memory data store for modern applications
srs ★ 29K SRS is a simple, high-performance, AI-driven real-time media server supporting RTMP, WebRTC, HLS, HTTP-FLV, HTTP-TS, SRT, MPEG-DASH, and GB28181, with codec sup
KeePassXC ★ 29K Cross-platform, secure password manager
Typesense ★ 27K Lightning-fast, typo-tolerant search engine for all
Kodi ★ 21K Full-featured media center for your TV and beyond
Helium ★ 21K Privacy-first browser with ad-blocking and no bloat
Audacity ★ 18K Professional audio editing made simple and free
Ceph ★ 17K Scalable open-source distributed storage system
zvec ★ 16K A lightweight, lightning-fast, in-process vector database
Organic Maps ★ 15K Privacy-first offline maps for hiking, cycling & navigation
Shotcut ★ 15K A free, open source, cross-platform video editor
zeal ★ 13K Offline documentation browser. Your personal reference library, searchable in an instant.
nebula ★ 12K A distributed, fast open-source graph database featuring horizontal scalability and high availability
Manticore Search ★ 12K Lightning-fast open source search engine for big data
lnav ★ 11K Log file navigator
Krita ★ 10K Professional digital painting made accessible to everyone
OceanBase ★ 10K High-performance distributed database for all workloads
Activeloop ★ 9.2K The tensor database for AI data
server ★ 8.2K MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers
thorium ★ 7.5K Chromium fork named after radioactive element No. 90. Source code and Linux releases. Windows/MacOS/ARM builds served in different repos, links are towards the
firebase-ios-sdk ★ 6.7K Firebase SDK for Apple App Development
taskwarrior ★ 6.1K Taskwarrior - Command line Task Management
Kdenlive ★ 5.7K Professional video editing without the price tag
infinity ★ 4.7K The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text.
Memgraph ★ 4.6K High-performance graph computing for scalable data analysis
LibreOffice ★ 4.4K Free office suite with Microsoft compatibility
RawTherapee ★ 4.2K Professional raw photo processing made free and powerful
OpenMQTTGateway ★ 4.1K MQTT gateway for ESP8266 or ESP32 with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, Bluetooth, beacons detection, mi flora, mi jia, LYWSD02
mapnik ★ 4.0K Mapnik is an open source toolkit for developing mapping applications
domoticz ★ 3.8K Free open source home automation system for Linux, Windows, Raspberry Pi. Supports Z-Wave, Zigbee, MQTT, and 150+ devices.
IRremoteESP8266 ★ 3.6K Infrared remote library for ESP8266/ESP32: send and receive infrared signals with multiple protocols. Based on: https://github.com/shirriff/Arduino-IRremote/
moneymanagerex ★ 2.3K Money Manager Ex is an easy to use, money management application built with wxWidgets
Timeplus ★ 2.3K Real-time stream processing made simple and affordable
Icinga ★ 2.2K Open source monitoring for complex IT infrastructure
HomeSpan ★ 2.2K HomeKit Library for the Arduino-ESP32
deconz-rest-plugin ★ 1.9K deCONZ REST-API plugin to control ZigBee devices
lms ★ 1.7K Lightweight Music Server. Access your self-hosted music using a web interface.
DPP ★ 1.4K C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!
AGenUI ★ 1.2K Native A2UI Renderer for iOS/Android/HarmonyOS. High performance streaming Generative UI. Custom Components, Styles and more.
CoMaps ★ 550 Navigate anywhere offline with complete privacy
Rythe-Engine ★ 534 Rythe is a data-oriented C++20 game engine built to make optimal use of modern hardware.
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Frequently asked questions
How many open source projects are written in C++?
This registry tracks 51 C++ projects, with 1,024,864 GitHub stars between them and a median of 10,385 stars. The most-adopted is llama.cpp at 128,581 stars.
Which C++ projects are most actively maintained?
49 of the 51 projects were pushed in the last 90 days. Each entry above shows its exact last-push date, so you can filter out dormant projects before committing to one.
What licence are C++ projects usually under?
43 of the 51 carry an explicit open-source licence across 9 distinct licences, and the licence is shown on every card. Permissive licences (MIT, Apache-2.0) are the safest default for commercial use; check the copyleft ones individually.
Should I use C++ or Rust for my project?
Both are viable. C++ is the better default if your team already knows it or the libraries you need are written in it; Rust may suit you better if you need the ecosystem, tooling or performance profile it is known for. The registry lists 51 C++ projects to work from.