ST Recover
The source code, and more information, is available on CodePlex.
ST Recover is a software tool for computer museums.
It can read Atari ST floppy disks on a PC under Windows, including special formats as 800 or 900 KB and damaged or desynchronized disks, and produces standard .ST disk image files. Then the image files can be read in ST emulators as WinSTon or Steem.