Amaya is a tool to update and create web files both remotely and locally. Development at the W3C began in 1996, and the purpose was to include and demonstrate as many W3C technologies as possible. Therefore, Amaya not only supports HTML and CSS, but can build XML, XHTML, MathML, and SVG. You can work on multiple documents in multiple formats all at the same time. It supports annotations, so you can make external notes, comments, and remarks as you develop.