BeejiveIM (pronounced bee-hive) is a feature rich, multiprotocol instant messaging client that blows the pants off any other chat program offered in the App Store. It uses your iPhone’s data plan to send and receive messages, photos, etc.

Skype for the iPhone is finally here! Make phone calls and chat with friends and family over WiFi without using a single minute of your iPhone’s voice plan.

Facebook for iPhone is the child prodigy of it’s web based social networking parents.