tcs = Total Conversions?
Have a look
here and look at Conquest Marines, Jungle Warfare, Marble Mania (if that's your thing), and Troopers. I think those would qualitfy and Total Conversions, and they seem to be getting the good reviews, all though I haven't played any of them yet.
Of the ones I was talking about yesterday, I've tried out Chaos UT2K3, Face Off and Jupiter Influx. Chaos UT2K3 is
right fun, with all kinds of really neat weapons replacements (a great medival crossbow, prox grenades, "hunter" grenades, trip mines, a great "rail gun", laser guided rockets, return of the Cutter and the Vortex Cannon/Bomb) plus a custom map pack.
Face Off is a small mod, but very very well produced...even more impressive when you find out it's been developed by just one guy! There are only 3 maps right now, but somebody's already converted Counter Strike's Aztec map for the mod. Keep an eye on this one, I think it's going to be really good.
Jupiter Influx was pretty neat, but a bit annoying because there was no screen to set up control binds, so I didn't really know what I was doing. But the graphics were pretty cool and I think it could be a lot of fun when the Beta comes out.