In case you were wondering how to get involved with the Flex SDK development, grab a “Subversion”:https://subversion.tigris.org/ client and checkout this repo: “https://opensource.adobe.com/svn/opensource/flex/sdk/”:https://opensource.adobe.com/svn/opensource/flex/sdk/ or just click on that link to look through the repo in the browser.

If you just want to view change logs for the most recent available downloads, “go here”:https://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+3.