When I began to use UIQ3 phone, I've tried many messenger apps that help me chat with my friends. Almost every application has its own strong/weak points but according to myself, I choose Slick - a Lonely Cat Games product.
Slick is a good messenger app for mobile devices. It's easy to use and supports many features, allows you to chat with your friends connected though various online messaging apps.
Recently, Lonely Cat Games has released the lastest version of this app, Slick 0.46 with improvements: Fixed ICQ/AIM bug sending empty messages to some IM clients, compatibility with S60 touch-screen phones (N5800) .
Main Features:
- Supported protocols: ICQ, Yahoo, AIM, MSN, Google Talk, Jabber
- Text messaging
- Emoticons
- Alerts - sound, backlight, vibration, notify window displaying the number of new messages
- Group and buddy management (add, delete, rename)
- Message history
- File transfer - send and receive files
- Sending / receiving offline messages
- Downloading files sent as links
Supported devices:
Sony Ericsson: P990, M600, W950, W960, P1, G700, G900
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Although Slick 0.46 is still in development but it make me feel satisfied. And you? Which messenger app you're using to chat on your phone? Feel free to share your ideas with everyone here. 
UNITED STATES and using 
