Where can I download icons?

[filemanager]

Does anyone know where I can download some icons? Some of the games (TuxKart, TuxPuck, etc.) don't have icons to go on the Games menu =\

[xequence]

Gnome-look.org :)

[Juippisi]

http://customize.org/
http://kde-look.org/
http://oceanic.wsisiz.edu.pl/~slabosz/wordpress/