facebook, imdb, what's on (tv guide), google earth, ebay, ifood.... those are some of the ones i have and use regularly

any that u like. i have 271 apps :P
its all about what u want.games,books,newpapers,comics,photography etc theres such a wide range, just look on the app store under the different categories and use the "other ppl who bought this app also bought" or whatever it's called

Beside the more famous ones, I use very regularly iGift4u. I can post almost anything on Facebook and Twitter and it makes my SMS and MMS incredibly cool. They have a lot of cute images for girls and love too, then birthdays, flowers, shopping, fashion, youtube, quotes... endless!!!

This game called Monkey Kick, no point, but SUPER addicting.
Super Poke Pets- Kind of like a Nano Pet only MUCH cooler!
Flood it- Super Fun
Where's Waldo- it's like my only paid app.
Text Plus- Good for Pranks
Dizzy Bee
Line up 2
Word Scramble

I didn't really get into the whole besides games apps lol.
Hope I helped.

I love Line Up 2 it's definitely my favorite!
I use Photobucket, Facebook, Pandora, Urbanspoon, and Myspace alot too.
:)

Soundhound - awesome little app that will identify a song if you sing or hum it.
Shazam - same as above, but only works with the actual song being played.
Polarise - makes any photos you take retro. Pretty neat.
ShopShop - digital shopping lists for anything.
Dictionary! - for the times you just have a mental blank, now includes a thesaurus.
Target WEIGHT - keeps track of your weight loss/gain goals.
Wise-Quotes - a little daily inspiration.

Hope that helps! xx