I second Karoshi - it was recommended to me last night and I played it non-stop for over an hour until I got stuck on level 36 (but I figured that out this morning!). Brilliant game, I hope they do a sequel.
Kometon. It's a game where you just explore and discover new worlds. It has some beautiful graphics and a really calm atmosphere.
Karoshi is a great game, as long as your patient. Kometen is really fun too, more of an exploration toy than a game. I know Karoshi just went universal, and Im pretty sure Kometen is too.
League of Evil Run! Solipskier Max Adventure Rogue Runner Silverfish Bug Heroes Alien Space Kosmo Spin Those are all great indie games.
League of Evil Super Quickhook* Pix'n Love Rush* Max Adventure Canabalt Bug Heroes Solipskier Definitely buy League of Evil and Super Quickhook. The others are awesome, but those two are easily my favorites.
Battleheart & Bug Heroes are two games that offer a TON of replayability, diversity, and endless fun. Two very committed Indie Devs that are constantly adding content, addressing problems, and listening/implementing community feedback often. I highly recommend both!
Mission Europa: an awesome 3D FPS RPG that was just submitted to apple. You can check it out at this link: http://forums.toucharcade.com/showthread.php?p=1594970#post1594970 And if you like what you see, please go to this thread and post so we could get the attention of the TA staff to preview/review the game. It's a really great indie game created by one independent developer, Ryan Mitchell, who worked on the game for over a year. http://forums.toucharcade.com/showthread.php?t=84845
Jet car stunts , game Dev story , tilt to live , league of evil , karoshi and (even though its not indie) NBA JAM!