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Foss GitHub Repositories (2026) · Open Source Tools

Discover the best Foss open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.

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85 matching projects · updated Nov 13, 2026 How we rank ↗

#81 TRENDING mvmike/min-cal-widget Kotlin 2016

Minimal calendar widget

◇ android ◇ android-widget ◇ calendar ◇ calendar-widget

18 ↑ +1 today

#82 TRENDING ovumcy/ovumcy-web Go NEW 2026

Self-hosted menstrual cycle tracker. Privacy-first, Docker-ready, beautiful. Track periods, predict cycles, own your health data.

◇ docker ◇ foss ◇ go ◇ health

14 ↑ +1 today

#83 TRENDING is-not-cool/registration JavaScript 2024

Get your own 'is-not.cool' subdomain!

◇ dev ◇ foss ◇ free ◇ free-for-dev

95 ↑ +1 today

#84 TRENDING mosparo/mosparo PHP 2021

The modern spam protection. Protects your forms from spam by simply checking the content. Open source, Free to use, Accessible, and Self-Hosted.

◇ accessible ◇ data-privacy ◇ foss ◇ mosparo

19 ↑ +1 today

#85 TRENDING FossifyOrg/Paint Kotlin 2022

A canvas you can draw on with different colors.

◇ android ◇ draw ◇ foss ◇ kotlin

25 ↑ +1 today

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