Gaia is a front-end Flash Framework targeted at anyone who develops Flash sites. It’s designed to dramatically reduce development time. It provides solutions to the challenges and repeated tasks we all face with front-end Flash site development, such as navigation, transitions, preloading, asset management, site structure and deep linking. It provides speed and flexibility in your workflow and a simple API that gives you access to its powerful features.

http://www.gaiaflashframework.com