Open Source Projects in C
ArmorPaint
3D PBR texture painting software
★ 5,408 Updated: Oct 2026 Status: Active
OPNsense
A hardened FreeBSD firewall that turns spare hardware into an enterprise security appliance
★ 4,759 Updated: Oct 2026 Status: Active
SolveSpace
Parametric 2D/3D CAD tool.
★ 4,213 Updated: Oct 2026 Status: Active
SOGo
A fully supported and trusted groupware server.
★ 2,175 Updated: Oct 2026 Status: Active
VokoscreenNG
An easy to use screencast creator.
★ 1,523 Updated: Oct 2026 Status: Active
Speek
A decentralized, serverless, and completely anonymous chat.
★ 767 Updated: Mar 2023 Status: Inactive
Mutt
Small, fast, text-based email client for the terminal
★ 279 Updated: Oct 2026 Status: Active
pfSense
The FreeBSD-based firewall that's replaced commercial appliances in countless networks since 2006
★ 171 Updated: Mar 2026 Status: Slowing
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Alpine
Friendly, full-featured text-mode email and news client
Status: Unknown
Inkscape
Free, powerful vector graphics editor
Status: Unknown
GrapheneOS
Privacy and security focused mobile OS
Status: Unknown
GIMP
GNU Image Manipulation Program
Status: Unknown