Want to write an application in pure ActionScript without MXML and Flex components? Maia can help you with that!
All you need is a Flex module or Flex facet with configured Flex or AIR SDK. Flex module is recommended because New Flex Module Wizard allows you to create pure ActionScript sample application in just few clicks.
After the sample ActionScript application is created, just open HelloWorld.as file in the editor…
… and then press Ctrl+Shift+F10 to launch it.
Hint: If you do not want to use Flex-specific classes at all, and neither want them to appear in code completion you may remove several SWC files from SDK you are using (Project Structure dialog, Ctrl+Shift+Alt+S):