Comment by Monotoko

Whatsapp, ebuddy pro, ebuddy XMS, Angry Birds, Angry Birds Space, FML, XKCD, Facebook, Spotify, BBC News, Dropbox, Steam and PokerStars are the more popular ones official I have installed. I also have Cydia, a few tweaks and finally Installous (didn't want to admit that - I don't use it often - but thought it may spread some light here)