There is no other sport like it.  Man and his companion performing together.  If you haven't seen this, you are missing out.

Air Major's Doghouse

America's Best Frisbee Dogs
America's Best Frisbee Dogs: Top Dogs at NFL NBA, CBA, Baseball, College Halftimes, company picnics , school assemblies and special events.

Andre Barreto
Brazil

Ashley Whippet
Home of the Ashley Whippet Invitational World Championships

Ashley Whippet International Japan
Japan

Belgian K9 Disc Heroes
Belgium

Bluegrass Area Disc Dogs
Stamping Ground, Kentucky

Brisbane and Region K9 Disc Club
Brisbane, Australia

Canadian Disc Dog Association

Central Alabama Disc Dog Club

Central Florida Dog & Disc Club

Colorado Disc Dogs

Crazy Fly'n Dogs
Germany  You can choose either German or English as the language of the site.

Dallas Dog & Disc Club

Disc-Connected K9's
World Famous Frisbee Dogs

Dog Play
They have a good page named Flying Disc Dog Sport

Frisbee Dog WebRing
Frisbee Dog WebRing

FrisbeeLab Site

Greater Jacksonville Disc and Dog Club

Guts Frisbee Home Page

Houston Canine Frisbee Disc Club

Indy Dog and Disc Club (IDDC)

International Disc Dog Handlers Association  
a grass roots member-supported organization representing and uniting the individual handlers, local and regional clubs and disc dogs that make up the Canine Disc sport. 

Japan Frisbee Dog Association
Japan

JFA Club Chiba
Chiba, Japan

JFA Club Sapporo
Japan

JFA Club Sendai
Japan

Jumpin Jax Disc Dog ExtraordinAIR

K9Disc.com

K-9s in Flight

Korean Frisbee Disc Dog Association
South Korea

Majestic Performance Dog Club
Japan

Missouri Disc Dog Club

Muttley Crew K9 Entertainment
California

Northwest Dog and Disc Page

NPA Dog Sports Production
Japan

Off-Hand Disc Dog Team
Duisburg, Germany

Olympic Disc Dogs

Purina Incredible Dog
Links to the Purina Incredible Dog Challenge, Incredible Dog Team and Dog Shows

Quadruped, The
Abusing gravity on a regular basis.

Sky-Dogs
Germany

Skyhoundz

Skyler's Den

Southern California K9 Air Corps

Southern Ohio Flying K9s

Spinning Frisbee K9's

St. Louis Disc Dogs
The most exciting thing on four legs.

UFO
Home of UFO World Cup Canine Championship Series

West Virginia Dog 'N' Disc

Windy City K-9 Disc Club

Yankee Flyers Dog & Disc Club
Letting the fur fly since 1999