kik

Sometimes we want to chat with people who have an iphone or an Android and as you know we can't do it with BlackBerry Messenger, so here you have the solution: Kik takes what people love about BlackBerry Messenger and brings it to all three major smartphone platforms. Like BBM, messages on Kik are sent almost instantly and you get a notification when it is delivered and received. The app is free, and you get unlimited messages.

Kik scans your address book for new friends, so be sure to add your phone number when you register so they can find you.