I don't know, I feel like Node.js has a fairly full-featured and useful standard library? https://nodejs.org/api/

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From the OP:

Comparison to Node.js

- Deno does not use npm - It uses modules referenced as URLs or file paths

- Deno does not use package.json in its module resolution algorithm.

- All async actions in Deno return a promise. Thus Deno provides different APIs than Node.

- Deno requires explicit permissions for file, network, and environment access.

- Deno always dies on uncaught errors.

- Uses "ES Modules" and does not support require(). Third party modules are imported via URLs:

import * as log from "https://deno.land/std/log/mod.ts";