require-link is a free Chrome add-on developed by Marinin Tim. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory. This handy tool aims to enhance your browsing experience when working with JavaScript on GitHub.

The main feature of require-link is its ability to automatically link the "require('module')" syntax to npmjs.com and nodejs.org/api. This means that when you come across a require statement while browsing JavaScript code on GitHub, you can simply click on it and be directed to the relevant package on npmjs.com or the corresponding Node.js documentation on nodejs.org/api.

It's worth noting that require-link ignores local requires, such as "require('./some-path')". This ensures that only global requires are linked to external resources.