Yahoo! Messenger

Friends are an instant away on Yahoo! Messenger for the iPhoneYahoo! Messenger for the iPhone allows you to IM friends and family right from your iPhone wherever you are. Connect with all your friends:Instant message with your Yahoo! Messenger contacts wherever you are.Show off and Stay in control:Show yourself as available or busy, go invisible, or show off your status and let your friends know what you’re up to

Company :	Yahoo! inc.
URL :	Yahoo! Messenger
Price :	FREE

Facebook

Company : Facebook, Inc.
url : Facebook
Price : Free


Facebook for iPhone makes it easy to stay connected and share information with friends. Use your iPhone to start a conversation with Facebook Chat, check your friends’ latest photos and status updates, look up a phone number, or upload your own mobile photos to Facebook while on the go. Even more features will be updated in the weeks and months ahead.

Version 1.1 allows users to write on their friends' walls, view their photo albums, and see their full profiles, and improves photo browsing and uploading