Ryan Dahl's secure-by-default TypeScript-first runtime. Deno 2 (2024) shipped npm compatibility and shifted Deno from 'curiosity' to 'real option'.
From Wikipedia
Deno is a runtime for JavaScript, TypeScript, and WebAssembly that is based on the V8 JavaScript engine and the Rust programming language. Deno was co-created by Ryan Dahl, the creator of Node.js, and Bert Belder.