- RISC OS developers - the world's first 32-bit RISC operating system - used in Acorn, Advantage Six, Microdigital and RiscStation computers. Site has content for developers, resellers and the public interested in using this ROM-based, low-overhead, operating system.
acornusers.org - - Hosts the Acorn News Service, newsgroup archives, RC5/DES effort, Charity Site and an FTP server for freeware software distribution.
Advantage6 - - Design, manufacture and retail RISC OS electronic devices in the embedded and educational sectors.
ANS Filebase - - A categorised database with version information.
ArcSite - - German portal. Offers news, articles, forum, links and web space.
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.
My RISC OS - - Automated web portal. Add news and reviews, and chat.
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.
RISC OS webring - - Provides free banner advertising of related websites.
RISCOS.org - - Portal offering news and articles. It includes a software database.
Select Scheme - - Yearly subscription to updated versions of RISC OS.
VirtualAcorn - - The fully-functional RISC OS emulator for Windows-powered computers.