George Farris has released
a Gnome version of Gfax, a popup fax application for sending
facsimilies from the desktop.
Gfax still lacks support for many features but does work with
the popular transport agents such as Mgetty+Sendfax and Hylafax.
These must be configured and working for Gfax to operate.
Gfax needs gnome-libs and gnome-objc to work.
More information can be found at:
http://www.gmsys.com/gnome-gfax.html.