A websocket is a continuous two-way connection between a web client (typically a web browser) and a web server. Since the connection stays open, not only can a web page send information to the server at any time, but the server can update the web page without requiring a page refresh or any user interaction. Dries Driessen shows how to use NetTalk 8, StringTheory and Cryptonite to create a variety of applications using this technology. Â