We have followed where so many have gone before and written an ST emulator. But we think it's worth a look because it is particularly small and easy to use (and install), plus it runs a few things which don't work on other emulators.
You need windows 32-bit and a half-decent computer to run it.
Have a look at http://steem.atari.org
Any feedback and comments very much appreciated, we think it's unusually good for a first release but there is plenty of room for improvement, as always!