Boomerang

Gel Boomerangs - Tuning and throwing instructions, tips on corrective measures for accuracy problems, and an explanation of events from this retired manufacturer.
http://www.gel-boomerang.com/

Boomerang Passion - Includes design plans with descriptions and pictures, decoration ideas, FAQ, photos, and related links.
http://www.boomerangpassion.com/

Boomerang Fun - Explains aerodynamics, types, games, history, and related links.
http://www.boomerangfun.com/

History of Boomerangs - A brief summary of the evolution of the sport.
http://www.rediboom.com/phpwcms/index.php?en_news&lang=en

Digital Boomerang Systems - Offers photos of original boomerang designs, and the basics of catch and throw.
http://www.boomsmith.com/

Long Distance Boomerangs - News, bulletin board, tournament results, and instructions; dedicated exclusively to long-distance throwing.
http://www.baggressive.com/

MX Boomerangs - Provides instructions on throwing, types and how they are made, and information on subscribing to the rang email list.
http://www.boomerangs.org/