The non-Wintel user group, supporting Acorn, Amiga, Apple, ARM, Be, NCs, PowerPC, Psion, Unix and other alternative operating systems. Services include a non-Wintel news summary.
Operating system for the CPC6128 and CPC-Plus. Information, downloads and help.
OSNews: Exploring the Future of Computing
Weblog style online magazine on operating systems and computing environments. Daily updates, reader forum with many comments.
Growing article, with links to many related topics. Wikipedia.
Operating System Sucks-Rules-O-Meter
The web-based operating system quality and approval metric.