Learn OCaml, exercises checked by WASM in browser
WASM OCaml compiler running locally in the browser for instant exercise validation.

Full PostgreSQL course running client-side with zero server costs or signups.
Developers learning SQL or brushing up on PostgreSQL specifics
SQLZoo · LeetCode Database · DataCamp
Most PostgreSQL courses require you to create an account or pay. This is probably because they have to bear the costs of running a full server-side database.
So I created learnpg.xyz, a collection of PostgreSQL SQL exercises that run client side.
Sharing here because it might be of use to people!
WASM OCaml compiler running locally in the browser for instant exercise validation.
Full ClickHouse engine in-browser via WebAssembly, zero server required.
pganalyze for schema mistakes, not performance — runs as CREATE EXTENSION with zero external deps.
Clean interface for drum rudiments, but lacks novel interactive features.
Yet another AI course generator when Khanmigo and countless tutors already exist.
Running Gecko and SpiderMonkey in WASM is an engineering flex few can match.