BQN[1] (an APL variant). There is something really beautiful/elegant to me about composing higher order functions in a purely point free way. Array programming is a nice application of this, and this one has the best ergonomics.

[1] https://mlochbaum.github.io/BQN/

Forth. I learned it very late in my programming career which started with Java. It just feels like home in a way that no other language ever has.

Mostly useless tho

Go is lovely - it’s super pragmatic and things just work.

Clojurescript. I used it to build an MVP proof of concept for work and now have to watch a small team re-write it using Typescript and Angular

They’re still not at feature parity with 2x the team, 2x the time and 3x the lines of code.

I love Clojure for data-related tasks, it's just better than anything else, even Python. And I love Clojure dialects for anything that talks to JS-engines - Clojurescript, nbb, squint - it's really nice to be able to use something like Puppeteer or Playwright and "interactively" click buttons, and navigate through pages in the REPL, it's like playing a video-game - super fun. And babashka is awesome for system scripting.

I don't currently use Python at work. I freaking love it.

Ada, from 8bits microcontrollers to amd64 and arm too... really portable, so readable and robust, strong typed, and great community too.

C!

My job is typical web TypeScript + Python

But in my spare time I’ve been deep diving C and loving it for the most part. Though I really hate strings in C!

It was Lua 5.1+5.2.

Then came out decent js versions, decent typescript ecos and Lua moved on to 5.3+.

Ended up using ts for everything. Feels absolutely down to earth, practical and useful, what I searched for all my life. All my non-bash home code is ts, except for ML chunks, where I have to suffer through the hideous abomination.

Scala, it's very elegant and functional style just ends up with less runtime bugs. You fight the compiler more, but that's more satisfying than having to RCA something eight weeks after it ships.

One I made myself: https://nongnu.org/txr

Elixir

Common Lisp.

Swift and SwiftUI is fun for my own projects. I use Python and C++ for work.

Mozart/Oz, see the CTM book.

Dafny and F* are also evolving pretty nicely.

I really like Lua, it's simple and easy to compile

I use Lua for small scripts on my small server at home. I use it inside OpenResty, one file per URL, sometimes calling local programs and always printing HTML for the browser. It's small and it works.

Fennel is great for someone who values homoiconicity and structural editing. It's a great joy to be able to reduce big chunk of Lua boilerplate into a three-liner macro in Fennel.

Rust, I thrive on its complaints :)

Smalltalk

Crystal; compiled Ruby!

Python, funnily enough

Julia

Lua

haskell

rust