Eigen is a Chrome extension developed by robert.j.nowell. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This free extension is designed to enable social link sharing, creating an exclusive hacker news experience with your friends.

To get started, simply install the Eigen extension and log in with your Google account. Once logged in, whenever you come across an interesting website, you can easily share the link with your friends through Eigen. Additionally, Eigen allows you to discover and explore links shared by your friends, adding a social aspect to your browsing experience.

Eigen operates as a shared list of links among your friends, making it easy to share, read, and have fun together. So, if you're looking for a way to enhance your link sharing experience and connect with friends through shared content, Eigen is worth a try.