Windows Live Messenger- Stay in the conversation, even as you’re heading out the door. Windows Live Messenger for BlackBerry smartphones places the desktop IM experience – from sending text messages to sharing photos – onto your BlackBerry smartphone
Upvise Wikipedia - Imagine having the entire knowledge of the largest collaborative encyclopedia in the world at your fingertips, anytime, anywhere. Just type in any word on your mobile and download instantly the entire Wikipedia article specially formatted for your mobile device. You can also bookmark any article to a create a list of favorites in your account
biNu for BlackBerry - biNu offers lightning fast access to a wide range of online content. It allows users to quickly access internet apps and services such as Facebook, Twitter, Google, Wikipedia, English dictionary, weather, news in many languages, live scores, FX rates, horoscopes and much more
A Lite version of award winning instant messenger for BlackBerry to chat within MSN, Yahoo!, Google Talk, AIM, Jabber, ICQ, Facebook, MySpace, Skype and Twitter
JIMM Mobile Messaging - Jimm is an ICQ™ clone for mobile devices with J2ME™ (MIDP) technology
(Java 2 Micro Edition / Mobile Information Device Platform)
* It's working on a lot of devices which have J2ME™ support
Pinger (BlackBerry) - Pinger lets you trade voice messages with anyone's mobile phone in over 20 countries. It's better than voicemail because there's no ringing or lengthy instructions. It's more personal than text because it's your own voice so there's no room to be misunderstood. Plus you can send a Pinger message to a group of people with just one call
Hyves- the most popular social network in the Netherlands has just released their BlackBerry client app. The great thing about Hyves is that you can keep in touch with your friends, colleagues, roommates or family. It is an easy way to keep in touch with the people you don't talk to every day