My Steam Server Browser for QuakeLive, Toxikk, Reflex, TF2, CS:GO, ...
EDIT: Also available as Steam Workshop Item, which will be automatically updated.
Supports server side filters (used on the steam master server) and all sorts of client side filters. Even alerts you when you're looking for something special that's not played all the time.
Edited by PredatH0r at 10:03 CST, 1 November 2015 - 17935 Hits