This is the GNU HaliFAX Sender, a component of GNU HaliFAX which will help you send Postscript and TIFF g3/g4 files to mgetty+sendfax or hylafax for sending faxes. . The GNU HaliFAX will be a complete free client package for HylaFAX and maybe for other fax systems in the future. It is intended to run on both the Win32 platform and the GNU system.