Nimbuzz allows you to chat online, exchange instant messages and send files from your phone for free.
The application pulls all your contacts together in one place, so you can exchange messages with all your friends on networks such as MSN, AIM, Yahoo! Messenger, Google Talk, Jabber, Facebook, or MySpace.
The user interface combines all of your contacts from all these various networks into one place, and you can see who is online at any time. If you want to get someone's attention, you simply 'buzz' them, and Nimbuzz will be launched on their phone.
Remember that you'll still get charged for internet access when using Nimbuzz. This is fine if you're using a WiFi connection or if you have a flat-rate data plan, but if you pay for data by the megabyte then using Nimbuzz could work out to be very costly if you're not careful.
However, if you have a flat-rate plan, Nimbuzz makes for a fun and cheap way to stay in touch with friends and family around the World.