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/

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

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/

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

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

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

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

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/

EXPN.com
- Online version of ESPN's action sports network covering skateboarding, snowboarding, surfing, inline skating, BMX, Motocross and X Games. Includes photos, events, tricks and tips, athlete columns, biographies, videos, and contests.
- http://expn.go.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. Site contains a calendar of upcoming events, related links, news items and membership details.
- http://www.fsa-sky.org/