1. OpenraOpen Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.
2. OpenramodsdkSoftware Development Kit for building your own games using the OpenRA engine.
3. Ra2A Red Alert 2 mod for the OpenRA game engine
6. OpenRAWebThe former source for the official OpenRA website.