The latest version of KFortune is available from http://www.fys.ruu.nl/~eendebak/kde/kfortune.html .
It's also available from ftp://ftp.kde.org/pub/kde and mirror-sites of ftp.kde.org.
To compile and install KFortune, you need a system running Linux and the libraries from KDE-Beta3 or higher. The KDE-libraries are available from ftp://ftp.kde.org.
KFortune may work on other systems, but hasn't been tested on them.
See the file README
from the KFortune distribution
for instructions on compiling and installing KFortune.