Are you tired of all those proprietary chat instant message clients, like Yahoo, AOL, ICQ, etc. Check out a program called Pidgin (formerly known as GAIM), its a free open source multi-platform multiservice instant message chat client. It allows you to communicate across all the major chat networks to stay in contact with all your friends and family.
One of the cool feature of Pidgin is that you can add plug-ins to do what you want. And since its multi-platform it runs on Windows, Linux, Mac, etc.