I'd say Rebol and Forth are less known exotic ideas for programming languages. I'd also look at Unison, for a more recent exotic programming language concept.

I'd say Rebol and Forth are less known exotic ideas for programming languages. I'd also look at Unison, for a more recent exotic programming language concept. And what GraalVM is doing with the polyglot layer is quite interesting. Finally my recent favourite is PPL, probabilistic programming languages. And for more I'd recommend this podcast https://futureofcoding.org/episodes/ https://futureofcoding.org/episodes/