I am playing with Eduardo Cavazos's libraries with Chez [1], and particularly the port of xspringies. Great fun considering as he points out that the mass-spring calcs are all taking place in scheme. It runs fine on my 2-3 year old notebook.

C was a third language for me in the day, and I like Lisps, so this Lispy-C thing is going to eat my afternoon up!

[1] https://github.com/dharmatech?tab=repositories