ShareLaTeX - https://github.com/sharelatex/sharelatex https://github.com/sharelatex/sharelatex is a web-based real-time collaborative LaTeX editor. The stack i

ShareLaTeX - https://github.com/sharelatex/sharelatex https://github.com/sharelatex/sharelatex is a web-based real-time collaborative LaTeX editor. The stack is a walking cliché: Node.js, Redis, MongoDB, Coffeescript. Lots of open issues, with plenty that are tagged 'good for beginners' (to the project, not necessarily with the tech). We've also got a dev chat room where we're available to help you get started whenever we're online: http://www.hipchat.com/g1nJMcj7b http://www.hipchat.com/g1nJMcj7b We have strong opinions about the correct way to write javascript/coffeescript to be unit testable, and how to write apps based on lots of small services which are robust and testable. We'd be delighted to have people contribute and either sway our opinions, or pick up some of our experience.