Related:

"A fast Pascal (Delphi) WebAssembly interpreter":

https://github.com/marat1961/wasm

"WASM-4":

https://github.com/aduros/wasm4

"Curated list of awesome things regarding WebAssembly (wasm) ecosystem":

https://github.com/mbasso/awesome-wasm

Google Chromium/Chrome V8 (JavaScript Engine) WASM Source Code branch:

https://github.com/v8/v8/tree/main/src/wasm

Also... it would be nice if there was a WASM software/soft CPU for QEMU, which (if it existed!) would go here:

https://github.com/qemu/qemu/tree/master/target