Nimbuzz! is a free call and messaging client available for PC, Mac, mobile phones and tablets. Nimbuzz to Nimbuzz conversations are free; landline, 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.