[eatonphil]

Many GNU programs come with a builtin Scheme interpreter (gdb, for example).

[leethargo]

You mean GNU Guile?

[eatonphil]

Yep [0]. However GIMP does not use Guile, it uses TinyScheme for it's Script-Fu [1].

[0] https://www.sourceware.org/gdb/onlinedocs/gdb.html#Guile

[1] https://en.wikipedia.org/wiki/TinyScheme