Viber on Android

VoIP client Viber has exited beta and is now available for download without an invitation.  If you aren't familiar, here's the skinny: Viber allows for free calling and texting among its nearly 20 million registered users over 3G and WiFi connections, across both Android and iOS platforms. Hit the break to grab Viber for free from its new home in the Android Market. 

Source: Viber