At Browserling, they are huge open-source fans and they have open-sourced 90 node.js modules! All written from scratch. You will find the complete list of all the modules together with their brief descriptions.

They have also published all the modules on GitHub, so that you can keep track of them easily. All of them are greatly documented so just click the ones you’re interested in to read more and see examples.

Requirements: Node.js
Demo: http://www.catonmat.net/blog/browserling-open-sources…
License: License Free