FriendCaller

Make free worldwide calls over Voice over IP or use text msg. FriendCaller to FriendCaller calls are absolutely easy and free. - free VoIP calls and IM - VoIP calls to landlines/mobiles - high quality, low cost We are currently in BETA, so feedback and bug reports are welcome:

Make free worldwide calls over Voice over IP or use text messages. FriendCaller to FriendCaller calls are absolutely easy and free. Just use your Facebook ID or email address to talk to all your friends instantly. There is no need to register for them.

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You can download at: http://apk.cuaban.net/detail/10509/FriendCaller.html