Make free PC to mobile phone international VoIP calls to your friends on Nimbuzz. Use NimbuzzOut to make PC to mobile cheap VoIP international calls to your friends, anywhere in the world. Nimbuzz is a free call and messaging app for the connected generation. Nimbuzz combines the powers of the Internet and mobile communications into one, and lets you make calls, send messages and share files, on any mobile device, for free. Here are some information and tips to know more about Nimbuzz application.