Nimbuzz-Messenger  [Nimbuzz Messenger is a free chat & calling app that helps you connect to your IM & Facebook friends]



 Facebook Mobile  [Share and stay connected with your friends with the new Facebook app.]



Fring Group Video Calls and chat   [FREE GROUP VIDEO CALLS, video chat & calls Group Video Calls, VoIP & Chat for free from fring ]



Viber  [Viber is a mobile application that lets you make free phone calls and send free messages.]