Adobe today announced the first public alpha version of Apollo. Apollo is a cross-operating system application runtime, that allows developers to use HTML, Javascript, Ajax as well as Flash and Flex to build and deploy rich Internet Applications on the desktop. It combines the internet with the desktop.
(Link)
Apollo provides people with direct access to Internet applications (including those built with HTML, JavaScript, Flash and PDF) without the need to open a browser, offering a familiar desktop application experience, and easier and more reliable interaction with content. When the internet connection becomes available, the data is easily synchronized.
The SDK is available on the link above, and is currently free of cost.
Apollo is the code name for a cross-operating system application runtime that allows web developers to leverage their existing skills in HTML, JavaScript and Ajax, as well as Adobe® Flash® and Adobe Flex™ software to build and deploy rich Internet applications (RIAs) on the desktop