SkyEye is an Open Source Software Project. The goal of SkyEye is to
provide an integrated simulation environment in Linux and Windows.
SkyEye environment simulates typical Embedded Computer Systems (Now it
supports Atmel AT91 board based on ARM7TDMI CPU, board based on ARM720T
CPU, board based on StrongARM (SA1100/SA1110). You can run some Embedded
Operation System such as ARM Linux, uClinux, uc/OS-II (ucos-ii) etc in
SkyEye, and analyze or debug them at source level.

WWW: http://www.skyeye.org/