A few installed on my phone:
Coin Pirates - Simple coin push style game, mrs loves it.
Contract Killer - Typical GLU game, it's ok but I found the controls really really fidgety.
Empire Online - Typical asian style mmorpg with cutesy 2D graphics. Only just started playing this a couple of days ago so can't really comment so far, apart from some dodgy translations.
Glyder 2 - Again it's another GLU game - fly about and collect stuff, bit meh.
GT Free - Installed it but keep forgetting to free space up to get the install fieles (800mb!). Looks like it's at least worth a try and even includes a realy track in Laguna Seca
Haypi Kingdom - Typical style empire building game, nice to check every few hours.
Inotia 3 - Nice JRPG - Played a couple of hours on this and it's pretty awesome, highly recommend this one, one gripe with it is very limited inventory space, argh!
Mega Jump - Cutesy game where you tilt your phone to collect items that bounce you higher and higher.
Star Legends - From the same developers as Pocket Legends, it's a 3D mmorpg. Again only played this for a few hours so far but it's pretty damn cool for a phone game. Do watch out though this REALLY saps the battery. Oh and it's free but pretty much every extra is paid for in real cash. I haven't played enough of it to find out if thats too much of an annoyance yet.
Star Blitz - and another GLU game

it's essentially Gun Bros in space.
A couple that I've installed and haven't got round to playing yet:
Warspear - 2D online RPG
World of Dragons - Same as above
The infinite black - Eve style game from what I can see
Sea empire - A RTS with pirate theme, actually may try this one right now, always liked the idea of a RTS on me phone
Shadow Era - Card based game, downloaded it because the art looks good, don't know how to play these type games though!
All the above games are free btw.
@Electroshadow - Do you have a link to vendetta? I can't find it!