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56203 resources
A ZX81 software archive.
An 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.
ZX81 hardware website featuring a project for building your own ZX81 with discrete components as well as Wilf Rigter's ZX97. In English, Dutch and German.
Technical specifications and pictures of the Sinclair ZX81 with comments from other ZX81 owners.
Tony Smith writes about the availability of ZX81 DIY kits.
The BBC reminisces about the memory-efficient programming motivated by the 1k ZX81.