Qtracker Description:

Game server browser that will help you play games on the Internet or at the local LAN party. Supports nearly all the most popular FPS games, such as: America's Army, Battlefield 2, Call of Duty 2, F.E.A.R., Half-Life, Half-Life 2, Quake 3 and 4, and Unreal Tournament 2004. Over 90 games are supported!

Primary features:

- Find your friends and/or clanmates using PlayerWatch.
- Color-coded player "fun names" using the in-game fonts.
- Mapshots show a small image of the level being played.
- Server list generation in HTML or PHP, including URL-based server launching.
- FAST querying.
- Skinnable PlayerWatch window, and customizable menus and toolbars.
- Server-side filters.

And tons more.