swfdec is a library and small player for SWF files.
Swfdec is a library for rendering Flash animations and games. swfdec project was originally designed as a basis library for creating Flash plugins for GStreamer, but it is a fully standalone library which only use the libart library for drawing. Swfdec is released under the LGPL.
Included with swfdec is Gtk+-based application called swf_play and a Mozilla plug-in that uses swf_play to display SWF animations in a browser window.