acornusers.org
Hosts the Acorn News Service, newsgroup archives, RC5/DES effort, Charity Site and an FTP server for freeware software distribution.

ArcSite
German portal. Offers news, articles, forum, links and web space.

My RISC OS
Automated web portal. Add news and reviews, and chat.

RISCOS Ltd
RISC OS developers - the world's first 32-bit RISC operating system - used in Acorn, Microdigital and RiscStation computers. The site has content for developers, resellers and the public that are interested in using this ROM-based, low-overhead, operating system.

Select Scheme
Yearly subscription to updated versions of RISC OS.

RISCOS.org
Portal offering news and articles. It includes a comprehensive software database.

ANS Filebase
Comprehensive categorised database, with version information.

Acorn User RC5/DES Group
Details of the cracking efforts.

RISC OS webring
Provides free banner advertising of related websites.

Microdigital Ltd
Developer and manufacturer of new RISC OS computer workstations.

Acorn Charity Site
Fund-raising efforts.

RISC OS Projects Initiative
Highlights new ideas for programs or projects, or those that might need assistance.

Nutshells
Categorized and cross-referenced database of shareware/freeware and software authors, with a broader database of companies and information.

RISC OS 3 Knowledge Base
Official site providing support for earlier versions of the operating system.

Castle Technology
Owner of the RISC OS copyright, they also manufacture, distribute and develop of Acorn Computers, as well as the acclaimed new Iyonix PC.

VirtualAcorn
The fully-functional RISC OS emulator for Windows-powered computers.