I bought into the idea of newLISP for scripting a few weeks ago and love it. I decided to tackle some project euler problems using newLISP, primarily so that I can learn the syntax and get familiar with the API.
That said, I won't purport that any of the solutions are optimal; only that they are beautifully terse. Experienced newLISPers will be quick to point out how horrible I might've done something, but this was a means to an end of learning the language. Repo for some solved problems here:
https://github.com/sponsy/project-euler-newlisp
Looks good. "Beautifully terse" is a good goal - "tersely ugly" less so... :)