HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

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

Whether you're building a Web or desktop application, here's a round-up of tools for building the interface with plain old HTML. Being able to work comfortably on Web-related code elements -- HTML, ...