OpenBSD/amiga OpenBSD/amiga: OpenBSD port to Amiga: the same as the NetBSD/amiga port but with some additions. (Operating Systems) http://www.openbsd.com/amiga.html
NetBSD 1.3 for Amiga NetBSD 1.3 for Amiga: NetBSD port for Amigas with MMUs. (Operating Systems) http://www.netbsd.org/Releases/formal-1.3/amiga.html
MorphOS MorphOS: Goal: provide modern functionality for a new OS layer and run most Amiga applications as efficiently as possible in a box environment with no old Amiga custom chips available. (Operating Systems) http://www.morphos.net/
NetBSD/amiga - Un*x for the amiga NetBSD/amiga - Un*x for the amiga: NetBSD/amiga is a free, portable unix like operating system for many machines, including the Amiga. (Operating Systems) http://www.netbsd.org/Ports/amiga/
AROS: Amiga Research OS 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. (Operating Systems) http://www.aros.org/