Heroes Vs. Monsters, Cut the rope, Plants versus Zombies, Fruit ninja, Tiny wings, and a game called 'Infinity Blade', which is probably the most beautiful game you have ever played on your iDevice ;)
Hmm lets see, Aurum blade( if you like fun rpg with grinding), empire online, DemonHunter, luna story, 7swords, DESTINIA, burn the corn, luna craft, solomons keep, solomons boneyard, ADVENA, and RO Violet. And this is only on my iphone hehe
Aurum blade looks like the same style as Zenzonia 4, and DESTINIA. >_<.
I played both. I finished DESTINIA in less than 24 hours. I reccomend it. Very fun.
I heard GraalOnline was pretty awesome. Also check out this one app called Turntable.fm, you can DJ your own music real-time with other members. The actual Turntable.fm site is awesome, the iOS one is just alright.