textPlus: Good free texting app for over seas
Sleep Cycle: I highly recommend this! It basically wakes you up when you are the most awake during a period of 30 minutes so that you get the most rest possible.
Pandora Radio
Listenr: Sign in with your Tumblr account & you can listen to all the music on your dashboard in an iPod format Really convenient!
Path: I love this app! It's like a mixture of Instagram, Tumblr, Twitter, & Facebook. You should try it out ^^