Download them. Play them. They are fun. Except maybe the first one.
There is a newer version of Geo-War (0408qui.level, also a default+ level, new version loads faster) here:
http://bitfighter.org/forums/viewtopic.php?f=8&t=109&p=602#p602.
I recommend you try:
0808qui.level "UnderRecover"
0908qui.level "gnop"
0309qui.level "Incursion Flags"
You are probably already familiar with "Bitwise Orrery" (0310qui.level) and "Geo-War," but those are certainly among the best.
Things that will not work:
0508qui.level "Sunburst": this gametype no longer works with team flags, an easy fix, change flag to neutral.
1108qui.level "Sarcophage": the visual effects with goalzones and the negative wall/resource gimmicks.
Thanks for playing and voting for my levels!