Coming soon to Steam Early Access, Tomatenquark is another attempt to revive a classic free and open source first-person shooter. The developer sent word today via Twitter, that it should be releasing in the next few weeks.
Tomatenquark describes itself as "a community homage to Cube 2: Sauerbraten", being based on the code of Cube 2 and their hope is to back ongoing development of the game and build up a community around it. With gameplay inspired by the fast-paced classics like Quake, their aim is just to bring back good classic first-person fun with various game modes. However, it also has the Cube Engine 2 editor which brings cooperative map/geometry editing in-game.
Seems like they're doing a similar thing to Warfork, another recent free and open source shooter that also released on Steam based on another classic Warsow.