Adventure Sports
Covers activities such as mountain biking, surfing, rock climbing, sailing, snowboarding and surfing.
http://www.suite101.com/welcome.cfm/adventure_sports/

Air Above Water
Information about cliff jumping. Includes photos, jumpers profiles, and directions to each jump site.
http://www.airabovewater.com/

Camp Woodward
Features tips and tricks for inline skating, skateboarding, and freestyle BMX racing.
http://www.woodwardcamp.com/

Ekstremsportveko
Norwegian extreme sports week involving base jumping, skydiving, paragliding, rafting, kayak, climbing, and mountainbike. Includes photos, results, videos, and sign up information.
http://www.ekstremsportveko.com/

Extreme Bros
Features BMX, climbing, skateboarding, snowboarding, surfing and wakeboarding. Includes news, events, forums, photos, videos, tricks and tips.
http://www.extremebros.com/

Federation for Sport at Altitude
Covers high-altitude sports such as skyrunning, skyski, skybike and sky raid. Calendar of upcoming events, related links, news items and membership details.
http://www.fsa-sky.org/

GimmeWAKE
The Ultimate Online WAKE Social Network Community for Wakeboard, Wakeskate, Wakesurf, and Boating Enthusiasts.
http://www.gimmewake.com/about_us.php

Grindco Productions
Specializes in all aspects of extreme sports entertainment; from conception to marketing. Specializes in skateboarding, snowboarding, ski jumping, BMX, FMX and personal watercraft racing.
http://www.grindco.net/

International Gravity Sports Association
Founded to support downhill inline skating, street luge, buttboarding, downhill skateboarding, and gravity biking. Includes news, rules, events, rider interviews, and links to related sites.
http://www.gravity-sports.com/

Kiiking
A new sport-art from Estonia. Features history, events, mission, photo gallery and services.
http://www.kiiking.ee/

Paragliding Schools
Uk paragliding school based in the yorkshire dales & spain. Providing tuition both here and overseas. Run by multiple british paragliding champion.
http://www.activeedge.co.uk/

Ripboard
Features photos, video clips, general information, and equipment of riverboarding whitewater at face level.
http://www.ripboard.com/