I worked on Scsh, the Scheme Shell, after my junior year at MIT. My primary contribution was the networking interface and I used it for a lot of protocol implementation for various projects at MIT. While at MIT I also made the first public Scsh releases and added a static linker to improve startup time. Although I did Scsh maintenance and releases for a few years after I left MIT, today Scsh is maintained by the good people at scsh.net. Scsh can be found prepackaged for systems such as Cygwin, Debian, and Ubuntu. For a slightly longer description of my Scsh work, see the MIT UROPs section of my research page.