KSendFax hopefully becomes a core application of the KDE project http://www.kde.org (but I don't hope on this anymore as they seem to have other tastes).
KSendFax can be found on http://ksendfax.sourceforge.net and (maybe) on the main ftp site of the KDE project ftp://ftp.kde.org/pub/kde.
In order to successfully compile KSendFax, you need at least the KDE 2.x.x libraries and development environment. To run the program it is only necessary to have the runtime libraries installed. All required KDE libraries can be found on ftp://ftp.kde.org/pub/kde/.
For scanner support you need a program as xsane installed or if you want to use the building scanner support you need the SANE libraries to be present on the system.
For certain features inside the program (as Preview) you need the convert program from the ImageMagick packages.
In order to compile and install KSendFax on your system, type the following in the base directory of the KSendFax distribution: