AIR GEAR is an open source IDE for Adobe AIR development. It works as an Eclipse plug-in so you can use it with many other Eclipse plug-ins and powerful features of Eclipse.
AIR GEAR has following features:
- Supports both HTML and Flex based AIR application development
- WISYWIG graphical editor for Flex
- Automatic build and error reporting
- AIR application launcher on the Eclipse
See this page about detailed use.
Enjoy your development!