Kugar is part of the KDE project http://www.kde.org/.
Kugar can be found in the koffice package on ftp://ftp.kde.org/pub/kde/, the main FTP site of the KDE project.
In order to compile and install Kugar on your system, type the following in the base directory of the Kugar distribution:
% ./configure % make % make install
Since Kugar uses autoconf and automake you should have no trouble compiling it. Should you run into problems please report them to the KDE mailing lists.