It can get a list of active servers from across the Internet, and can parse any finger or Web page for IP addresses. Just fill in the address and roll your own list. There are a variety of optional filter settings. GameSpy goes out to the sites on your list and determines the server name, map name, current and max players, and displays them starting with the lowest (best) ping time. You can check a server for all sorts of information, like the ping and packet loss, who's playing, their colors, frag counts, rules, etc. And GameSpy features a player query capability that lets you find your buddies on the net, join their games and frag them!
GameSpy supports the following games: Baldur's Gate, Blood II, Daikatana, Dark Vengeance, Descent III, Drakan, Half-Life, Heretic II, Hexen II, Kingpin, Nerf Arena Blast, Quake, Quake II, Redline, Rogue Spear, Shogo, Sin, Soldier of Fortune, Starsiege TRIBES, Turok II, Wheel of Time, and Unreal.