An Introduction to Ultimate:

• Ultimate in Ten Simple Rules. A quick overview of the rules of Ultimate.
• The Ultimate Players Association, an association of Ultimate players that sponsors tournaments and competitions in the US.
• The Rules of Ultimate 10th Edition, by the UPA.

Skills:

• The Ultimate Handbook An Ultimate resource for everyone from beginners to advanced players.
• Basic grips
• Ebb and Flow's animated Java applets showing various drills, offenses, and defenses. Very informative.

Tournaments:

• Minnesota Ultimate Disc Invitational (MUDI), open, coed, women in Maple Plain, Minnesota
• Cooler Classic, an annual open, women's, and coed tournament in Delafield, Wisconsin.

Other Leagues:

• The UltiMap Locator, a handy web page that let's you find what teams and leagues are in your area.
• Chicago Ultimate.
• Boston Ultimate.

Equipment:

• Gaia Ultimate, maker of Ultimate-frisbee specific sports gear.
• Frisbee Hunter, an online store for Frisbee sports equipment.

Miscellaneous:

• UltiLinks, a list of Ultimate sites around the world.
• UltiTalk, Ultimate oriented discussion forums.
• PlayUlty, educational and lifestyle products for Ultimate.
• Ultimate T-Shirts, not suprisingly, an online store selling Ultimate themed T-shirts.