[reikonomusha]

CLOG [1] seems to do something similar (though it's hard to tell; Seed's README isn't terribly informative), except CLOG has more tutorials, is better documented, has a more fleshed out README, and has ongoing support.

[1] https://github.com/rabbibotton/clog

[NeutralForest]

CLOG is something I've wanted to try for a long time but then I need to spend some time learning CL.

[veqq]

CLOG has its own CL course.