GameSpy 3D - 2.18 

GameSpy 3D is the best way to find and play action games over the Internet. It'll find and sort Quake, Quake II, Unreal, and Hexen II servers from across the Net, so you can find the ones with the fastest connection to your machine -- you'll spend less time lagged and more time killin'! You can also find out who's playing, on what level, and in what version of the game. GameSpy can even save preferences and launch the game for you once you've selected a server.

Roger Wilco - Mk Ic 

Roger Wilco is a stand-alone application that allows you and your friends to talk to each other while playing multiplayer online games. It works with most existing games and does not require subscriptions or dedicated servers. Supports web integration, ICQ integration, and game integration.