Morgan Stanley have released an internally developed, JIT compiled PL based on LLVM! https://lambda-the-ultimate.org/node/5452
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I've released difftastic 0.63! In this release:
* Better parsing of Elixir, LaTeX, Make, Nix, Rust and YAML
* Better detecting of text encoding, especially on Windows
* Prebuilt musl binaries, so you can run released binaries on older systems!
https://github.com/Wilfred/difftastic/releases/tag/0.63.0
Bril is a cute intermediate language for teaching (think simplified LLVM IR): https://www.cs.cornell.edu/~asampson/blog/bril.html
The idea of providing a standard JSON format to help students write basic passes is really elegant.
Deno has the cutest PL mascot I think I've ever seen. Are there any other contenders?