Open Source C++ Software & Tools

Cross-platform open-source video editor built on the MLT framework with a wide format support and no import required.

OpenShot is a free, open-source video editor for Linux, macOS, and Windows with unlimited tracks, keyframe animation, and 3D titles.

A free, open-source engine and community project recreating Age of Empires II with a modern C++ and Python codebase.

Open-source product analytics with session recording, feature flags, and A/B testing — self-hostable. Replaces Google Analytics, Mixpanel, and Amplitude.

Low-latency, open-source voice chat built for gaming — self-host your own server with no subscription required.

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

Free, open-source desktop video editor for Linux, Windows, and macOS built with Qt 6 and FFmpeg.

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

An open-source reimplementation of RollerCoaster Tycoon 2 that expands the original with new features, rides, and multiplayer.

Continuous peer-to-peer file synchronization that speaks the Syncthing BEP protocol and needs no cloud account.

Cross-platform PDF viewer focused on textbooks and research papers with smart navigation, marks, bookmarks, and bibliography jumping.

Free, open-source screen recorder and video editor with polished demos, captions, zooms, and local AI editing.

KeePassXC is a cross-platform, community-driven port of KeePass Password Safe. Store credentials locally in an encrypted database, with no cloud required and full data control.

A deep, turn-based open-world survival game set in a post-apocalyptic world ravaged by zombies and catastrophe.

A free, open-source real-time strategy game inspired by The Settlers, focused on building economies and thriving settlements.

Open source network backup and recovery for mixed IT environments with disk, tape, and S3 storage, a web UI, and multi-OS clients.

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.

Free and open source multi-track video editor built on MLT Framework and KDE technologies.

Free open-source non-linear video editor with hardware-accelerated compositing and cross-platform support.

An open-source simulation game based on Transport Tycoon Deluxe, letting you build and manage a vast transport empire.

A classic open-source side-scrolling platformer starring Tux the penguin, inspired by the original Super Mario games.

Lightweight open source BitTorrent client with native desktop apps, a headless daemon and a built-in web UI.

Free, open source turn-based strategy game set in a high-fantasy world, with single-player campaigns and online multiplayer.

Open-source Bloomberg-style finance terminal built in C++20/Qt6 with embedded Python, AI agents, and 100+ data connectors.

A powerful free and open source office suite with word processing, spreadsheets, presentations, and more.