Mini games using Meks. These use some art assets from megamek (http://megamek.info/) and therefore these games are also licensed under the GPL (http://www.gnu.org/licenses/licenses.html).
To play the games visit the game's page: http://minimek.sourceforge.net
The newest game is called "RogueMek". It is a Rogue-like adaptation of the Battletech board game. In it you choose your mech then battle it out against multiple enemy mechs.
...Technical decisions have been made such that contribution to and development of the project is as straightforward as possible.
Check the README for how to play, set up a testing server, or contribute to the project.
You can play on the public server at http://pyrop.us:1234