Kevin Baker's ZX81 Page
Page with support files for Sinclair ZX81 and Timex TS1000/TS1500.
Matthew's ZX81 Homepage
Software library, reviews, news, emulators for various platforms.
Obsolete Computer Museum's ZX-81 Page
Technical specifications and pictures of the Sinclair ZX81 with comments from other ZX81 owners.
Project 81
Aims to preserve ZX81 related documents in digital form.
Rodney Knaap: Build your own ZX81
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.
Sinclair ZX-81 back from the dead
Tony Smith writes about the availability of ZX81 DIY kits.
Sinclair ZX81 Benchtest
Article from Personal Computer World by David Tebbutt.
Sinclair ZX81 Collection
Collection of original Sinclair ZX81 hardware, software and literature. Photos and description for each item.
Sinclair ZX81 FAQ
Some common questions about the ZX81.
Steven's ZX81 Computer
Links and information from an enthusiast.
System Variables of the Sinclair ZX81
Memory map of the RAM reserved by the system.
The ZX97 by Wilf Rigter
A project to design and build an enhanced, low power discrete logic version of the ZX81.
Zebra Systems, Inc.
Timex-Sinclair ZX81 computer kits for sale.
ZX-180
A modern version of the ZX80, ZX81 for the home hobbyist builder.
ZX80 hardware page
How to build your own ZX80 and ZX81.
ZX81 'Caverns' Game - PC Remake
Author of the original 1980's 'Caverns' game offers a PC remake for download. Includes game history and instructions.
ZX81 - Planet Sinclair
Information, photos and resources for the Sinclair ZX80, including a detailed account of its development extracted from Ian Adamson and Richard Kennedy's book "Sinclair and the Sunrise Technology".
ZX81 CD Game Collection
Suppliers of ZX81 games and emulators on CD, enabling you to reproduce the ZX81 on your Windows PC.
ZX81 Forever
Pictures, newsletters and programs made with the ZX81, a 16kb rampack and a Timex 2040 printer. Updated monthly.
ZX81 kit
UK based sales and support of ZX81 computers in kit form, also related peripherals and books.
ZX81 Stuff
Collection of ZX81-related documentation plus hardware and software projects.
ZX81 Virtual Community
Contains links, a scanned copy of the ZX81 manual as well as ZXTAPE, a DOS-based utility to transfer ZX81 software from a PC to a ZX81 or tape recorder, and to transfer ZX81 software from tape back to PC.
ZX81Kit .Com
A European supplier of the classic Sinclair ZX81 computer in Kit form.