Hspin Yo-Yos: Manufacturers of the Handquake line of bimetallic yo-yos. Located in Zurich.
SuperYo: Makers of a full line of ball bearing and fixed axle yo-yos including the Renegade.
Yomega: Manufacturers of yo-yos. Site includes calendar of events and store locator.
YoYoSpin.com: Offering one-of-a-kind hand made yoyos, as well as display boxes.