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For a longer list of languages written in Rust, see https://github.com/alilleybrinker/langs-in-rust

Rhai and Gluon are the other two big ones. I've used Rhai for a configuration system and it was pretty good. Very very easy to integrate. Unfortunately it is also dynamically typed and doesn't support type annotations yet, but I reckon they'll add that eventually.

Gluon is statically typed but it's also functional and a bit weird.

So Gleam moved to Rust, interesting. I remember it was supposed to be a type safe language for Erlang, because while Elixir exists, it's not type safe, one of the main reasons I didn't start using Elixir, much as I like the Erlang philosophy.

It still targets Erlang—but the compiler's written in Rust (from the first v0.1 release in 2019).

It also targets JavaScript now, and maybe eventually Webassembly.

Tracking issue for native code is here: https://github.com/gleam-lang/gleam/issues/109 unlikely they will directly compile to WASM.

A similar language to gleam built on WASM is grain: https://github.com/grain-lang/grain