What is "swftools"

SWFTools is an open source software tool suite for creating and manipulating SWF files. Distributed under the terms of the GNU General Public License, it may be compiled from C source, to run under Linux, Microsoft Windows, and Apple OS X. On Microsoft Windows systems, the pre-compiled installer also installs a GUI wrapper for the suite's PDF to SWF conversion tool, pdf2swf.

SWFTools relies upon, and links against, additional third-party libraries for some of its functionality, e.g. Xpdf, PDFlib, freetype, and libjpeg.