Web Platform Tests (WPT) is a massive shared test suite that checks whether all major web browsers — Chrome, Firefox, Safari, Edge, and others — behave consistently when displaying websites and web apps. Think of it as a universal quality checklist that browser makers run to confirm their software follows the agreed-upon rules of how the web should work.
// why it matters When browsers behave differently, developers must build workarounds that add cost and slow down shipping — WPT is the industry's shared mechanism for reducing that friction, making the web a more reliable platform for products to run on. For builders, broader browser consistency means less money spent on cross-browser bug fixes and greater confidence that web-based products will reach users as intended, regardless of what device or browser they use.
HTML5.9k stars3.8k forks3242 contrib
Homebrew Core is the central library of software packages for Homebrew, the most popular free tool for installing software on Mac and Linux computers. It contains thousands of pre-built recipes that let developers quickly install common software tools with a single command instead of manually downloading and configuring them.
// why it matters With over 15,000 stars and 15,000 contributors, Homebrew is effectively the default way millions of developers set up their machines, making it a critical distribution channel for developer-facing software. If you're building a tool that developers need to install, getting it listed here dramatically lowers the barrier to adoption and signals legitimacy to a technical audience.
Ruby15.2k stars13.5k forks15041 contrib
MDN Web Docs is the internet's most comprehensive free reference library for web development, covering the rules and standards that govern how websites and apps are built across browsers. Maintained by thousands of volunteers and backed by Mozilla, it serves as the authoritative guide that developers worldwide consult when building anything for the web.
// why it matters With over 14,000 pages and 45,000 contributors, MDN is the de facto standard that shapes how developers learn and implement web technologies — meaning it indirectly influences every product built for the web. For founders and product teams, it signals what web capabilities are available and standardized, helping inform decisions about what features are safe to build on without compatibility risks.
Markdown10.6k stars23.2k forks5510 contrib
Homebrew Cask is a command-line tool that lets Mac users install desktop applications with a single typed command, eliminating the traditional 'download, unzip, drag to Applications folder' process. It manages the entire lifecycle of Mac apps — installing, updating, and removing them — the same way you'd manage any other software from a terminal.
// why it matters With over 21,000 stars and 12,000+ contributors, this is one of the most widely adopted Mac developer tools in existence, meaning a huge portion of your technical audience already relies on it daily. Getting your app listed as a Homebrew Cask is a meaningful distribution channel for any Mac-first product targeting developers or power users.
Ruby21.9k stars11.4k forks12653 contrib
