Here are the best links around the net. Ferretted out for your every need.
If you are bored you can always insult Shaved  Nipples at [email protected].   
 

Links.
 

B.J.Zanzibars World of Darkness.
An excellent site full to bursting of White Wolf world of darkness resources.

Chaosium Hompage.
Official site of the creators of Call of Cthulhu, Pendragon and Elric, among others.

FASA homepage.
Home to the creators of Battletech, Earthdawn and Shadowrun

Pinnacle Entertainment Group.
The official Deadlands page with a constantly updated list of of resources ready for downloading.

RPG.Net.
A site dedicated to role-playing in all it's forms, very useful for finding obscure role-playing links.

Steve Jackson Games.
The official homepage of SJG. Includes resources for GURPS and In Nomine.

TSR Hompage.
Contains news and downloadable resources, mainly from old and out of print TSR material.

White Wolf Homepage.
A attractive site containing information on White Wolf games direct from themselves. Contains downloadable resources mostly in PDF format.

Wizards of the Coast.
The homepage of the creators of Magic: The Gathering. Watch them, they could soon rule the world.