Winterthur: (map, travel, hotels, ....)
Winterthur Tourismus
Winti Guide

Sports in Winterthur:
Sportamt Winterthur
Dachverband Winterthurer Sportler
Sky Hawks Frisbee Club

Discgolf / disc sports:
Swiss DiscGolf Association
World Flying Disc Federation
Professional DiscGolf Association
Disc Golf Association
Schweizer Frisbee Sport Verband
DiscSport im deutschsprachigen Raum
see others Swiss DiscGolf

Clubs, tournaments, tour, ....:
PDGA Euro Tour
Swiss Disc Golf Database
DiscGolf Genève
DiscPeople Club Biel
Merry Chains Basel
Speed Sports REGIO Rheinfelden
Voodoo Warriors Zürich
Walkabout DiscGolf Club Bern
Charlotte Disc Golf Club