Nimbuzz!

Ever heard of Nimbuzz? It's a totally free app that lets you make calls and send messages from pretty much any device your computer, Mac, smartphone, or tablet. The best part? Chatting with other Nimbuzz users won’t cost you a thing. And if you need to call regular phones or international numbers, the rates are super affordable.

But Nimbuzz isn’t just about calling. You can shoot instant messages to your buddies one on one, or jump into group chat rooms when you’re in the mood to hang out with more people. Feeling social? You can even blast your messages straight to Twitter without leaving the app.

Adding friends is a breeze. Nimbuzz pulls contacts from all your favorite platforms like Google Talk, Yahoo, Windows Live, Facebook, and even SIP/VoIP services. No more manually adding everyone!

Oh, and it gets better. You can share photos, videos, and music with your crew, or challenge them to some fun in app games. Want to show off your style? Customize your profile with cool avatars choose from animals, cartoons, love themes, or just upload your own photo.

On the plus side, Nimbuzz works with most popular chat protocols, includes VoIP functionality, and is really simple to set up. It’s lightweight too, so it won’t slow down your device. That said, it doesn’t support every protocol out there, and sometimes call connections can be a bit glitchy. Still, for a free app, it packs a lot of punch!