ShareJS is an Operational Transform library for NodeJS & browsers. It lets you easily do live concurrent editing in your app.
Announcing browserify, a node.js module that bundles up all your javascript into a single file so you can use node.js-style require() from the browser.
Sleek, intuitive, and powerful front-end framework for faster and easier web development.
Node.io is a relatively new screen scraping framework that allows you to easily scrape data from websites using Javascript, a language that I think is perfectly suited to the task. It’s built on top of Node.js, but you don’t need to know any Node.js to get started, and can run your node.io jobs straight from the command line.