dMSN (soon to me called Mercury) is a cool Java based chat program that connects to ICQ and MSN.

dMSN is just like your normal MSN, you can sign in, talk to friends, change your name, talk with your friend etc.. But dMSN has a few extra functions the normal MSN doesn't have, you can see when someone removed you from his or her list, you can send screenshots to friend, all MSN6 avatars are downloaded to your disk and viewable, see who invites you into a multi-user conversation etc.