The Plex Toolkit is a collection of JavaScript libraries which handle the transformation of custom XML markup embedded in an HTML document into user interface components, and creates a consistent environment in which to develop Rich Internet Applications – or more sensationally AJAX – using JavaScript, while smoothing over the browser incompatibilities. Plex requires no plugins to work, only what ships with a modern browser such as Firefox (Mozilla) or Internet Exploder – support for Konqueror (and therefore Safari) and Opera is coming soon