It's pretty rough and volatile but I have my own somewhat unique game engine for Guile Scheme. https://dthompson.us/pages/software/sly.html

Hypergiant for Chicken, maybe Lush and Ypsilon (code.google.com/p/ypsilon)

you might find fluxus interesting. http://www.pawfal.org/fluxus/

Take a look at http://extempore.moso.com.au/