An anonymous reader writes "OpenArena is a project designed to provide a free Quake 3 experience. While the source for Quake 3 is free, the data is not so OpenArena is making all new Q3A compatible data to go with an upgraded engine. Many existing Q3A maps and mods already work fine but the project needs your support. 0.70 is available for Windows, Linux and MacOSX and is mirrored at many popular sites. Try it out, and contribute if you can."