Open source cpp projects
Every project in the registry tagged cpp, ranked by real GitHub adoption.
Reverse engineer anything with agents, from app behavior down to native binaries.
Lightning-fast analytics for massive datasets
Open-source financial terminal for data-driven insights
Blazing-fast in-memory data store for modern applications
Privacy-first offline maps for hiking, cycling & navigation
Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more
A distributed, fast open-source graph database featuring horizontal scalability and high availability
A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West
Lightning-fast open source search engine for big data
A fast image processing library with low memory needs.
Animated sprite editor & pixel art tool -- Fork of the last GPLv2 commit of Aseprite
⚡️ The fastest key/value storage for React Native. ~30x faster than AsyncStorage!
🚀 A lightweight, framework-agnostic database migration tool.
最全面的游戏开发技术图谱(Game Development Map)。帮助游戏开发者们在已知问题上节省时间,省出更多的精力投入到更有创造性的工作中去。
The framework for building with WebAssembly (wasm). Easily & securely load wasm modules, move data, call functions, and build extensible apps.
Continuous profiling for analysis of CPU and memory usage, down to the line number and throughout time. Saving infrastructure cost, improving performance, and i
Use any web browser or WebView as GUI, with your preferred language in the backend and modern web technologies in the frontend, all in a lightweight portable li
C/C++/ObjC language server supporting cross references, hierarchies, completion and semantic highlighting
Free open source home automation system for Linux, Windows, Raspberry Pi. Supports Z-Wave, Zigbee, MQTT, and 150+ devices.
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Open-source document editing suite for secure collaboration
Hierarchical spreadsheet: a free-form data organizer that replaces outliners, mind maps and spreadsheets.
Ultra-low-latency asynchronous C++17 logging and metrics library for performance-critical applications
3D game engine with lua scripting
A modern open source rendering engine for animation and visual effects
Real-time stream processing made simple and affordable
Money Manager Ex is an easy to use, money management application built with wxWidgets
File and Archive Manager
The IDE for competitive programming :tada: | Fetch, Code, Compile, Run, Check, Submit :rocket:
💡Extremely fast enterprise server framework, can be used in RPC, game server, web server.
Marrying Rust and CMake - Easy Rust and C/C++ Integration!
C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!
U++ is a C++ cross-platform rapid application development framework focused on programmer's productivity. It includes a set of libraries (GUI, SQL, Network etc.
Non-destructive 2D graphics editor (POC)
CLion plugin for Bazel projects
Nimble Commander - dual-pane file manager for Mac
Catch and fix the code-quality issues AI coding agents leave behind - dead code, unsafe casts, swallowed errors, duplication, security risks, and more. 50+ dete
PokerTH is a poker game written in C++/Qt.
Related tags
Frequently asked questions
How many open source cpp projects are there?
This registry tracks 38 projects tagged cpp, with 707,615 GitHub stars between them. The most-adopted is rea at 422,352 stars.
Are these cpp projects free to use?
Yes — 34 of the 38 carry an explicit open-source licence across 9 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which cpp project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these cpp projects still maintained?
36 of the 38 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.