Tour de Flex is a desktop application for exploring Flex capabilities and resources, including the core Flex components, Adobe AIR and data integration, as well as a variety of third-party components, effects, skins, and more.
Some screenshots taken from flex.org
Tour de Flex Eclipse Plugin
An Eclipse plugin is available that provides a search interface to the 200+ samples in Tour de Flex. Search by component name, tag or author and double-click any item in the results to immediately see the component in Tour de Flex.To install the plugin, add the following URL to your Eclipse software update sites: http://tourdeflex.adobe.com/eclipse. Once installed, a new Tour de Flex view is available to add. The plugin has been tested with Eclipse 3.4 and with Flex Builder 3.x.