HTC Advantage - Fix for Windows Live Messenger for English version - If contacts appear as offline in Windows Live Messenger even though they are online, download this fix (.exe file) and install it on your device to solve the problem.
Note: Only the 18125.0.2.3 OS build and earlier versions have this problem and need to be installed with the hot fix
imov Messenger Basic - imov Messenger gives you the ability to instantly communicate with your contacts using the Internet. The Jabber platform's extensibility allows imov Messenger to be compatible with multiple messaging systems
OctroTalk (Pocket PC) - OctroTalk is a Mobile Instant Messaging software with full voice integration. This always-on product keeps you connected with your buddies, and your buddies reach you whenever, wherever. Works seamlessly over GPRS/EDGE/CDMA/Wifi/Bluetooth data connections, and cuts down your phone bills
Chatbox for You and Me - Get a Chatbox for You and Me and solve times where you need to write a private "paper" conversation between you and your friends. Chatbox for You and Me is a simple chat application that allows you to comment and clear away the entire chat easily.
And the best part - it is completely free
Whoosh Cam is a free service that allows your friends and family with mobile phones to view live images from your webcam and text chat with other people connected to your webcam.
Whoosh Cam is great companion when you are away from friends and family by allowing you to see live images of your loved ones and send/receive text chat messages all within the same application
QQ(English) - [Version Description]
Mobile QQ for Windows phone 7 is an Instant Messaging application developed by Tencent Company with which users can chat with friends anywhere anytime.
[Feature List]
1. C2C/Group Chatting support
2. User customize icon display support.
3. Personalized signature modification support.
4. contact adding and local searching support.
5
Sqij - Messengers - Access a number of Instant Messenger services from your phone/PDA. We currently support the following IM''s: * MSN/Live Messenger * Yahoo Messenger Send and receive instant text messages easily and cheaply using our Messenger applets