Nimbuzz! is a free call and messaging client available for PC, Mac, mobile phones and tablets. Nimbuzz to Nimbuzz conversations are free; land line, mobile and international numbers can be called at low rates. But Nimbuzz is more than making phone calls. You can instant message one-to-one with close friends or join chat rooms for multi-people conversations.
If you want to go even more public, Nimbuzz sends your messages to your Twitter profile. Adding new contacts is easy: Import them from your instant messaging accounts and social networks such as Google Talk, Yahoo, Windows Live and Facebook as well as SIP/VoIP providers.
Nimbuzz also lets you share photos, videos and music with your friends, and play games together. To personalize your profile, the messenger includes a range of avatars from several categories, e.g. animals, cartoon and love but you can add your own picture, too.
Nimbuzz! does have some good features such as it works with most chat protocols, it has a VoIP function and it is easy to set up and use. Nimbuzz! is lightweight and uses minimal resources. The downside is that it doesn't support all protocols and some of the call connection features sometimes fail.