Confide - On the off chance that you need to get your messages private and encoded then utilize Confide that will fill in as your own and classified courier.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Handcent - Handcent – Free Messenger for Texting and MMS is the most customizable, powerful, and next-generation messenger app that makes user-experience more enjoyable and convenient.
Facebook Messenger - Facebook Messenger is a faster way to message.
Reach - Mass messaging app for the iPhone
Digsby - Tagged makes it easy to meet and socialize with new people through games, shared interests, friend suggestions, browsing profiles, and much more.