www.UltimateHandbook.com - A comprehensive guide to the rules of Ultimate

www.ultilingo.com - A guide to the terms and definitions used in Ultimate

www.Gaia-Ultimate.com - A company that designs and sells Ultimate equipment

www.UPA.org - USA governing body of Ultimate frisbee (both club and college level)

www.collegeultimate.org - Site dedicated to college Ultimate 

www.discraft.com - The most popular company that sells standard and custom Ultimate discs

Rec.Sport.Disc - Ultimate newsgroup

www.richmondultimate.org - Homepage for the Greater Richmond Ultimate League (GRUL)