Review Of Serenity Virtual Station
JigSaw writes "Here's some serious competition for VMWare and Virtual PC: OSNews reviews a new OS emulator, the Serenity Virtual Station, which can run as a host on FreeBSD, Linux and OS/2 and supports as guests a slew of OSes. It is based on the twoOStwo virtual operating engine (which additonally runs on top of Windows as well)."
Yes, there is Bochs, which is able to run Windows 2000, Windows 95 and a lot of Unices. It is an x86 emulator and according to their own FAQ pretty slow. But if you just want to run some programs from time to time - there you go.
HTH