Gnash is a GNU Flash movie player. Till now it has been possible
to play flash movies with proprietary software. While there are a
few free flash players, none supports anything higher than SWF v4
at best. Gnash is based on GameSWF, and supports many SWF v7 features.

Features:
- Runs standalone
  Gnash can run standalone to play flash movies.
- Firefox plugin
  Gnash can also run as a plugin from within Firefox.
- SWF v7 compliant
  Gnash can play many current flash movies.
- XML Message server
  Gnash also supports an XML based message system as is documented
  in the Flash Format specification.
- High Quality Output
  Gnash uses OpenGL for rendering the graphics.
- Free Software
  Gnash is 100% free software. For more information on the GPL, go
  to the Free Software Foundation web site.

WWW: http://www.gnu.org/software/gnash/