NPM on GitHub is a Chrome extension developed by uncenter. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This free extension allows users to view NPM package downloads for GitHub repositories.

With NPM on GitHub, users can easily check the popularity of a package on NPM and determine if it's the right fit for their project. The extension detects if the current repository has a matching package on NPM and displays its information directly on GitHub. This feature provides valuable insights for developers, helping them make informed decisions about the packages they choose to include in their projects.

By providing convenient access to NPM package information, NPM on GitHub simplifies the process of evaluating the popularity and suitability of packages, saving developers time and effort in their project development workflow.