I wrote a small GUI based HTML scraping client about 5 years ago with PLT Scheme. It was a wonderful experience and building a basic cross-platform GUI was pretty easy given the great documentation those guys write along with the language.

The executable was small, and it was easy for the users to pass around a little 1MB .exe file on windows (also had a separate compiled version for OS X) and they used it for years after I left until the web pages it targeted changed (and I don't work there anymore).

If somebody is open to learning Scheme, you can't go wrong building something in Racket, I was pretty surprised what I accomplished in a month.