Been busy doing other stuff these days, still need to do the multiplayer... though I'm not leet enough to shoot, aim and move with a touch device yet, noticed I need more practice.
Still, we have Super Stickman Golf that went free again recently, that has asynchronous multiplayer if anyone is up to it:
http://itunes.apple.com/us/app/super-stickman-golf/id397049430?mt=8
The awesome Train Conductor has gone free today, had a lot of fun with it when it came out back in holidays 2009:
http://itunes.apple.com/app/train-conductor/id344442490?mt=8
Fan of shoot 'em ups? Co-op? Toon Shooters has gone free yet again:
http://itunes.apple.com/app/toon-shooters/id531282611?mt=8
And I noticed this weekend, but a favourite developer has had all of its games for free for quite some time, enjoyed Solomon's Keep and Hoggy a lot, so they are a no brainer for free:
http://itunes.apple.com/us/app/solomons-keep/id365183754?mt=8
http://itunes.apple.com/us/app/solomons-boneyard/id387497198?mt=8
http://itunes.apple.com/us/app/hoggy/id338547319?mt=8