On top of my head
-Facebook
-messenger (if you send a lot of Facebook inbox messages)
-whatsapp
-twitter
-Itorch 4 (flashlight app)
-instagram
-tumblr
-dolphin browser
-sky fire
-dropbox
Jail broken apps
Bitesms
5 icon dock
5 column
Unlimvideos (stream and download any movie)
Installous
Sbsettings
Winter board
There's a shitload of apps in the iPhone 4 thread if you search
Games:
Fruit ninja
Zynga poker
Tilt to live
Cut the rope
Plants vs zombies
Bejeweled
TAPPI BEAR (download the packs with 9 games)
Tiny wings
Jetpack joyride (highly addictive)
Infinity blade
Monster dash
There's threads for best app store apps on rs lol ilvtofu started it iirc when the iPhone 4 came out
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