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The 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. While Flex applications can be built using only the free open source framework, developers can use Adobe® Flex® Builder™ software to dramatically accelerate development.
See a FLEX Example here : a movie application using Amazon 3 as movie storage

or

click Install on the right side to download and install the same application as an AIR application.
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The Adobe® AIR® runtime lets developers use proven web technologies to build rich Internet applications that run outside the browser on multiple operating systems.