The document discusses Filthy Flex, which are graphically rich web applications created with Adobe Flex that immerse users. It provides an overview of Flex including its cross-platform capabilities, use of ActionScript and MXML, and demonstrations of common tasks like handling events, invoking JavaScript, making HTTP requests, using transitions, and building mobile apps with Adobe AIR. Technologies that can be used with Flex include LiveCycle, BlazeDS, Red5, and Cairngorm along with examples of how to implement common patterns like MVC.