KeystoneJS - Open source framework for developing database-driven websites, applications and APIs in Node.js.
Contentflow - Live Streaming Software
Calipso - Calipso was built to be a simple Node.js based CMS, similiar to Drupal and Wordpress.
Ghost - Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Strapi - Strapi is the most advanced Node.