JerryScript is a very lightweight JavaScript engine with capability to run on microcontrollers with less than 8KB of RAM.

Deno is a simple, modern runtime for JavaScript and TypeScript that uses V8 and is built in Rust.

nwjs

bun is a new JSX/TypeScript transpiler, CSS & JS bundler, and JavaScript runtime environment designed for developer productivity.

Build iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript

V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++.

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine.