AROS: Amiga Research OS
   Goal: create an OS as compatible as possible to AmigaOS 3.1, but which can be ported to various CPUs: x86, 68k; PowerPC, Alpha, SPARC, MIPS.
   http://www.aros.org/

MC1 Amiga
   MC1 Amiga are an on-line store trying to make it easier for Amiga users to get hardware. MC1 stocks new SCSI, used Amiga parts and some software. MC1 have a full list of Australian Amiga User groups and Amiga dealers in the links page.
   http://mc1.boing.net

MSV
   Features a memberlist, pictures, downloads, and reviews.
   http://home.no.net/kafische/

Multi User System Security
   A low level security system for the Amiga, consisting of a new filesystem and a library. It implements a security system similar to that of UNIX.
   http://mufs.sourceforge.net/

NetBSD 1.3 for Amiga
   NetBSD port for Amigas with MMUs.
   http://www.netbsd.org/Releases/formal-1.3/amiga.html

NetBSD/amiga - Un*x for the amiga
   NetBSD/amiga is a free, portable unix like operating system for many machines, including the Amiga.
   http://www.netbsd.org/Ports/amiga/

Official AmigaOS Portal
   News and information about all current AmigaOS versions.
   http://os.amiga.com/

OpenBSD/amiga
   OpenBSD port to Amiga: the same as the NetBSD/amiga port but with some additions.
   http://www.openbsd.com/amiga.html

TeamAROS
   AROS support page.
   http://thenostromo.com/teamaros2/

Workbench Nostalgia
   Dedicated to the preservation and restoration of the Amiga Workbench's history.
   http://www.gregdonner.org/workbench/index.html

Yahoo Groups: AmigaOS4
   Mailing list about Amiga OS4.X for the new AmigaOne compatible machines.
   http://groups.yahoo.com/group/AmigaOS4/