Hi, I've just released the first alpha of CrutziPlayer, a standalone player for NPAPI browser plugins (like libflashplayer.so)
It can be downloaded in source (Python) as a .deb on http://www.crutzi.info/crutziplayer
It's very unique, as it uses a new method to scale flash content fullscreen, using XComposite, XFixes and Cairo.
E.g. playing the game Samorost fullscreen is as easy as