Martin Transparent Windows 1.1
With this program, you can view the contents of windows below the one in which you're working.
It can also be used to disguise windows and make your MSN messenger window virtually transparent no one can see what you are typing.
Keep track of all your IM friends in one place with Adium view it
Add networks and contacts to Adium with just a few clicks view it
Windows Live Messenger has evolved into a full-featured IM application. view it
Windows Live Messenger lets you manage all your contacts view it