wmQStat is a dockable front-end to qstat by Steve Jankowski, a popular command-line monitor of lots of Internet game servers, i.e. Quake/W/2/3, Hexen2/W, HL/CS/HL2, Tribes/2, RtCW, UT200x, DooM 3, FarCry, to name a few (this list is by far not complete).