Amethyst provides all the tools you would expect from a professional-quality Visual Studio development product including:
IntelliSense
Drill-down debugger
Code Refactoring
Customizable Code Formatting
Auto-expanding Snippets
Drag-and-Drop application design
Align controls to ‘alignment bars’
Align controls to a customizable grid
Round-tripping between the Designer and Code Editor
Import/Convert Wizard for existing Flex or Flash Builder projects
Share code with the Flash IDE to edit and debug Flash projects with Amethyst