Top Open Source Projects Built With C++ in 2026
A curated collection of the 81 best free and open-source projects built using C++. Discover popular repositories, architecture patterns, and trending software in 2026.
Zen Browser
Privacy-focused, feature-rich web browser
Stars44,112Last commit11d agoLicenseMPL-2.0
YunoHost
Self-host your digital services easily
Stars2,967Last commit14d agoLicenseAGPL-3.0
Waterfox
Privacy-focused open-source web browser
Stars6,202Last commit11d agoLicenseOpen SourceTimescaleDb
Time-series database built on PostgreSQL
Stars23,425Last commit11d agoLicenseOpen SourceShotcut
Free cross-platform video editor for Windows, Mac and Linux
Stars15,001Last commit12d agoLicenseGPL-3.0
GPT4All
Run open-source AI models locally on your device
Stars77,395Last commit15mo agoLicenseMIT
NetData
Real-time infrastructure monitoring with AI troubleshooting
Stars80,318Last commit10d agoLicenseGPL-3.0
Nagios
Free open source network & server monitoring tool
Stars2,040Last commit1mo agoLicenseGPL-2.0LibreOffice
Free and private office suite, no forced AI
Stars4,278Last commit10d agoLicenseGPL-3.0GIMP
Free, open-source image editor with professional tools for photo manipulation, digital art creation, and graphic design. Cross-platform support.
Stars6,378Last commit11d agoLicenseOpen Source
Darktable
Open source raw photo editor and workflow manager
Stars12,992Last commit10d agoLicenseGPL-3.0Audacity
Free cross-platform audio editor and recorder
Stars17,637Last commit10d agoLicenseOpen Source
Activeloop
Continual Learning Infrastructure for AI Agents
Stars9,228Last commit3mo agoLicenseApache-2.0
Voiden
Offline Git-native API workspace
Stars1,586Last commit26d agoLicenseApache-2.0Valour
Open-source community platform with chat, wikis, and voice
Stars393Last commit11d agoLicenseAGPL-3.0
