MPlayer and the Zone. Good times. What sucks is some multiplayer games now have worse interfaces and are a bigger pain in the ass to join a game than we had back then.
I faintly remember "the zone" Not sure if i used it much, but i think it was a microsoft software.
Never used it.
Heat.Net however, brings many memories...Netfighter(yum!!!), Plane Crazy, Vigilance,
Wasn't the zone a place with multiplayer game rooms for things like chess and backgammon?