ArcEm v1.00-cvs-20110126-1 is released. ArcEm is a Acorn A400 hardware emulator that is highly portable, it currently runs on Unix (X Windows), Microsoft Windows, Mac OS X, the GP2X handheld, RISC OS and Amiga OS 4. As it's a hardware emulator it's capable of running multiple operating systems including
RISC OS 3.10 and ARM Linux.

Download: ArcEm v1.00-cvs-20110126-1
Source: Here