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/
Goal: Provide modern functionality for a new OS layer and run most Amiga applications as efficiently as possible in a box environment with no Classic Amiga custom chips available. http://morphos.pegasosppc.com/
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/