http://www.op3dfx.com/
Operation: 3.d.f.x. The best 3dfx voodoo site.

http://www.3dfx.com/
3dfx information, drivers, etc.

http://voodoo2.com/
Voodoo II information. Card reviews, etc.

http://www.danbbs.dk/~gig-raf/3dfx/menuuk.htm
Cracked 3dfx patches.

http://voodoo.torget.se/
Svenska 3dfx. In swedish.