Unison (https://www.unison-lang.org/)

My new BUSY build system specification language (https://github.com/rochus-keller/BUSY/blob/main/README.md) and of course Oberon+ (https://github.com/rochus-keller/Oberon/blob/master/README.m...).

Common Lisp, because that's what I am learning right now.

Rust, because I finally made it from beginner to intermediate level (at least I think).

https://flix.dev/ looks very cool.

Also, recently someone posted this here on HN: https://github.com/coalton-lang/coalton

It's a statically-typed, functional language embedded in Lisp, with many of the FP goodies.

Firstly, the old ones. C, JOVIAL, ADA, BLISS, etc. Digital archeology, basically.

Secondly, the ones that are new. Not Rust, Go, or even Carbon or CPP2 new. Not new like academically new. New like some practical one I haven't heard of yet. I'll know it when I see it (like Rust or Go 10 years ago).

Everything that guarantees the fundamental safeties.

So not Rust, but Lisp, pony, Concurrent Pascal and all it's derivates.

Even though Elixir is quite a few years old it’s still very exciting to work in that ecosystem.