Racket has already been mentioned in this thread, but I think https://beautifulracket.com/ https://beautifulracket.com/ deserves a special mention. It is a diam

Racket has already been mentioned in this thread, but I think https://beautifulracket.com/ https://beautifulracket.com/ deserves a special mention. It is a diamond of programming literature and fabulously teaches the topic of language oriented programming in a language designed for that purpose. I recently made a SQL for web dev in Racket and it was astonishingly easy.