Open Source C Software & Tools

A free, open-source empire-building strategy game inspired by Civilization, playable in single-player or online.

OpenVPN is an open source VPN daemon

Free offline maps app for travelers, hikers, and cyclists using OpenStreetMap data. No ads, no tracking.

Open-source AI agent toolkit with an interactive coding agent CLI, unified multi-provider LLM API, and TUI libraries.

Lightweight client/server network backup and restore tool with librsync deduplication, TLS client authentication, and Windows and Unix clients.

Client/server backup system combining file and image backups with fast incremental backups, a web admin UI, and bare-metal restore.

A simple, lightweight home media server for UNIX systems.

A community-led fork of Organic Maps. Free offline maps for Android and iOS with no ads, no tracking, and no data collection.

A beautiful terminal email client built with Go and Bubble Tea. An open source alternative to Superhuman and Outlook for the command line.

Get up and running with Llama 3.3, DeepSeek-R1, Phi-4, Gemma 3, Mistral Small 3.1 and other large language models.

Self-hosted image sharing app that ships as a single static binary with multi-user support and shareable guest albums.

Lightweight, free PDF, eBook, and comic reader for Windows that launches instantly and stays out of the way; multi-format support with minimal interface.

AirAssist is a menu-bar thermal monitor and workload governor for fanless Macs. Watch CPU temps live and throttle heavy processes before throttling hits.

GNU Image Manipulation Program — the venerable free, open source image editor and Adobe Photoshop alternative.

OBS Studio is free and open source software for live streaming and screen recording. Capture, mix, and broadcast video with pro-grade tools used by streamers and creators worldwide.

An agentic development environment built on a modern Rust terminal emulator with AI-powered coding features.