1. Slacker Radio – This application is basically a clone of Pandora, but it offers one great premium feature which Pandora doesn’t, which is why it edges Pandora out of the “turning your iPhone into a radio” category. Slacker Radio allows you to listen to any brand of music you want with a smart DJ feature which will play songs in similar families, all with unlimited music skips if it plays a song you hate.

2. Textfree Unlimited – This great alternative to SMS messaging lets you message for free using push notification, so you’re no longer stuck with those high SMS charges for sharing pictures and moments with your friends.

3. TweetDeck – There’s nothing like having a great Twitter application to enhance your experience, and now you can bring your favorite Twitter client directly on your iPhone with you, so you can answer the question, “What are you doing?”

4. QuickOffice – This great little app allows you to edit all of your Word and Excel documents on the go, so if you’re sitting in class or at a meeting and you need to make some last minute changes, you’re free to do so.

5. Kindle – Need your Kindle in a smaller package? This great iPhone app lets you take all of your Kindle books with you, on your phone. While is not as easy to read as the original, it saves space by putting your eBooks into one place instead of lugging around another device.