Many Moons ago, Matthias Blume built an implentation of Scheme called VSCM. He subsequently decided that SML was a better programming platform, and ceased maintenance of VSCM. Well, all that's changed; well no, it hasn't, but I'm picking up the code because I like Scheme.
Hey, I've got a day-job, too, you know? Sometimes things don't move as fast as I'd hope. Here's a thumbnail sketch of the latest and greatest:
The old source tarballs are available on the SourceForge project site.