Adobe Flex
Adobe Flex is a highly productive, free open source framework for building and maintaining expressive web applications that deploy consistently on all major browsers, desktops, and operating systems

Developer Perspective

Applications developed in Flex dramatically improve customer experiences when shopping online and open new opportunities for transacting business over the web. With Flex 2, we can better control every element on a customer’s computer screen, enabling buyers to interact dynamically with items and complete purchases more efficiently than ever.