A software developer from San Francisco managed to do what no one else did before, creating a fully-functional two-way chat using only CSS and HTML, completely ditching JavaScript in the process.

jsFiddle lets developers play with the three core elements of Web development. Check out this powerful application for rapid prototyping and testing.

Unlike the previous beginner course, this one covers HTML5, CSS3, the Twitter Bootstrap CSS Framework and JavaScript, which the instructor describes as the programming language for the web.