Alchemist Research: One of the last Sinclair user groups still around today. Provides online version of AlchNews newsletter, a public domain software library, emulators and support information.
Anestis World - In Spectrum We Trust: Greek ZX Spectrum club, offering news of the club, hardware and software information.
Chicago Area Timex/Sinclair Users Group: Contact information and news of the group's forthcoming events.
Club QL International: Provides a monthly newsletter on QL matters, with back issues downloadable from the site.
The HCC Sinclair GG: Large international Sinclair user group which provides support services, public domain software and emulators, also organising user group meetings and shows throughout the year. (In English, Dutch and German)
Timex/Sinclair NorthAmerican User Groups: Provides information about the groups' activities and links to related Sinclair and Timex/Sinclair websites.
ZX-TEAM: A very active German Sinclair ZX81 users' group. Site offers information about the Sinclair machines and the group's activities, including news of forthcoming events. (In English and German)