Deno
deno.com
A modern JavaScript and TypeScript runtime with built-in security, native TypeScript support, a standard library, and first-class support for web platform APIs — with a formatter, linter, and test runner included.
Why it is useful
Runs TypeScript directly without a build step and includes a formatter, linter, test runner, and bundler built in — eliminating most of the Node.js configuration overhead. The permission model (no filesystem or network access by default) makes scripts safer to run from untrusted sources. Deno Deploy provides global edge deployment that feels like serverless but runs your code near users.