The Windows 32 builds of Gnash available from this website now use an installer for easy installation and removal of Gnash. Like the executables themselves, the installer is created under Debian GNU/Linux using only free software.
Gnash now runs under Windows (32-bit). I've published binary executables with corresponding source archives in the download area.
The Windows executable uses SDL for the GUI and sound, AGG as a renderer, and FFmpeg (LGPL) as its media handler.
It is built using mingw32 under GNU/Linux and only minimally tested in a real Windows environment, so expect teething problems.
These are unofficial binaries and are not supported by the Gnash team. Please report bugs with the executables to me directly, not to the Gnash bug tracker!