FIE » Federation Internationale D'Escrime » YouTube
USFA » US Fencing Association » Twitter
NCIFL » Northern California Intercollegiate Fencing League
Cal Fencing on Facebook
East Bay Fencers » Also run by Coach Abdul
Halberstadt Fencers' Club » San Francisco
The Bay Cup is the local circuit. Find tournament listings on AskFred.
Alliance Fencing Equipment » They have a store located in SF, but relatively far from BART.
Physical Chess » (Website under construction as of 7/30/2014.)
The Fencing Post » heh
Victory Fencing Gear » They have a store in Milbrae (~5 minute walk from Milbrae BART).
AskFRED » Sign up for tournaments
Coaches' Compendium » coaching and theory
CyrusofChaos » fencing on YouTube
Fencing in the Schools » Promote youth fencing in the US
Fencing Officials Comission » Official info for US fencing referees
fencing.net » General resources
Game » Learn the rules of foil.