The following Omnigia pages and open-source projects relate to Scheme or are implemented in it:
- a Scheme compiler based on CPS conversion and trampolines. For the impatient, there's an online CPSCM demo page.
- a portable implementation of the SCSH regexp API
- A file system for Digg, based on Fuse and the Digg API.
You may also want to look at the Scheme posts on the main Omnigia blog.