discordjs/collection

Home Assistant is an open-source home automation platform that puts local control and privacy first. It runs on your own hardware — a Raspberry Pi or a local server — and ties thousands of smart-home devices together, so the logic that runs your house lives in your house, not on someone else's cloud.

Hunt down social media accounts by username across social networks

Scrapy is an open-source Python framework hosted at scrapy/scrapy, built for crawling websites and extracting structured data. The README describes it as cross-platform, requiring Python 3.10 or newer, maintained by Zyte (formerly Scrapinghub) together with outside contributors, and distributed via both PyPI and conda-forge under a BSD-3-Clause license.

DefinitelyTyped is a pnpm monorepo hosting thousands of `.d.ts` packages published to npm under `@types/<package>`, so you install them like `npm install --save-dev @types/react` and the compiler picks them up automatically. The catch is the two-year TypeScript support window — older TS versions can still get older package versions via npm dist-tags, but there's no guarantee you'll find what you need for legacy projects. When contributing, you generate package scaffolding with `dts-gen`, write a `<package>-tests.ts` file that gets type-checked (not run), and validate with `pnpm test <package>` which runs dtslint including the newer `attw` checks for package.json `exports`/`type` alignment. The repo is large enough that Microsoft recommends a blobless clone, and PRs go through a self-service bot workflow rather than manual review — which keeps throughput high but means you're navigating tooling docs more than talking to humans. If the library you want typed is on npm, authors are asked to bundle their own declarations instead of contributing here.