• ​etherpad - 多人同時共同編輯的純文字記事本

  EtherPad sends messages in both directions between the browser and the server, 
  using a technology often called "Comet" or "server push". 
  This comparatively recent innovation in web app functionality allows EtherPad 
  to be fully real-time.
  

• ​The AppJet Web Platform - etherpad 背後的 framework