XQF is a game server browser designed by Roman Pozlevich and works as a GUI for Qstat. It helps online gamers find game servers. XQF is under active development since 1998, making it one of the oldest products of its category. XQF is available for X11/GTK systems and the most prominent type of its category for unix systems.
XQF differs from competitors because it is an open source GUI for the low-level scanner Qstat and has no scan ability itself.