Quake II related sites:

Quake2.com : Very good and up to date!
PlanetQuake : Large site with lots of Quake and Quake II related stuff.
Frag.com : Seems to be a large Quake and Quake II site, plus some extras.


Other Links:

WinFiles : Very large and up to date software archive for windows users.
Winamp : Home of the best mp3-player around.
Mirabilis : Get ICQ here! NOW!