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Skype.
 
Slingplayer for iphone

OP: for casts, try the app Downcast. It's a universal app with both ipad and iphone versions.
 
Rocketmania is a cool game but they dont utilize maximum space making the tiles you manipulate smaller then need be. its still very playable but it had so much potential to be better by using more space. its like a semi fullscreen setup.
 
Tiny Wings, addicting game I must say. But, I have the iPhone and the UStream app was just optimized and it is a stunner
 
Hanging with Friends
Skype
Facebook

I used to have a much bigger list, but it seems every time I turn around, another of my favorites has been optimized.
 
Devil May Cry 4 refrain and Street Fighter 4 Volt. I'm not much of a gamer but when it comes to games, these two are all i need. I wish they where iPad sized though. (And that DMC4r had Dante Must Die difficulty 😱)
 
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