Wikipedia
Swfmill
swfmill is a free software command line tool that generates SWF files.
It is an XML-to-SWF and SWF-to-XML processor. It uses SWFML, an XML dialect closely modeled after the SWF format. It comes with XSLT capabilities, and a more accessible dialect of SWFML to generate SWF files.
swfmill may be used to generate SWF files that contain library assets for use with MTASC. Currently, it imports images ( JPEG, PNG), fonts ( TrueType), SVG and other SWF files. It may also place assets on the stage, create movieclips with multiple frames, textfields, among other things.