Xonotic is a free and open-source first-person shooter video game.

OpenELEC (Open Embedded Linux Entertainment Center) is a Linux distribution designed for home theater PCs and based on the Kodi (XBMC) media player.

Red Eclipse is a fun-filled new take on the first person arena shooter, built as a total conversion of Cube Engine 2.

Vulkan is a low-overhead, cross-platform 3D graphics and compute API. Like OpenGL, Vulkan targets high-performance realtime 3D graphics applications.

Polycode is a C++ and Lua framework for building interactive applications. It is free, open source and cross-platform.

Cocos2d-x is an open-source and cross platform open source free 2D game engine for mobile game development known for its speed, stability, and easy of use.