Facebook Messenger ChatFree
Facebook Messenger is an instant messaging service and software application which provides text and voice communication. Integrated with Facebook's web-based Chat feature and built on the open MQTT protocol,Messenger lets Facebook users chat with friends both on mobile and on the main website.
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Nimbuzz Messenger Free
Nimbuzz Messenger is a free chat & calling app that helps you connect to your IM & Facebook friends.
Skype Mobile: Call, IM and more on Skype from your Android, Nokia or Sony Ericsson smartphones