Scsh is a Unix shell embedded in Scheme. It provides full access to POSIX as well as extensions common to most Unix implementations. Scsh also features many abstractions to ease system programming: process abstraction, event-based interrupt handling, sophisticated I/O support and enables concurrent system programming.
The new version is mainly a bug-fix release, the only new features are command-line switches for loading exec scripts and support for some more SRFIs.
Visit http://www.scsh.net/ for more information about scsh.