SE|PY is a FREE ActionScript editor for Macromedia Flash files. If you’re currently not satisfied with the Flash IDE editor or you’re already using Scite|Flash (also a great editor!)

Features:

Code folding (collapsing/expand) , code highlighting
Auto Completion for default flash functions
Auto Completion with the user added functions (in current document only)
View documents in tab mode
Zoom
Panel with all inserted functions for all active documents
Flush Support (Flush, compile, test movie, view output) for Flash mx 2004 too
Print out and save html document from your .as files
Smart Snippet panel, todo panel, file panel, flash api panel
ClassBrowser integration
Lines Bookmarks
Flash mx 2004 project file integration
Possibility to define classpaths (add the autocompletion)
ClipBoard management
XML structure reader (for dom query)
Flash MX 2004 Help panel (* only with Flash mx 2004 installed)
Program Menu localization with XML files
Automatic JavaDoc creation from methods
Collapse/expand javadocs comments
Syntax checker, with MTASC
and more...