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"No reason not to have it!... I love when apps like this come along that are both insanely useful & best of all free," - CrackBerry.
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Nimbuzz Messenger Free
Nimbuzz Messenger is a free chat & calling app that helps you connect to your IM & Facebook friends.
WeChat is all-in-one communications app for text (SMS/MMS), voice & video calls, Moments, photos