Download the source tarball (for example: xfract20.3.02.tar.gz), put it in
your home directory, and untar it with the command:

tar -xzf xfract20.3.02.tar.gz

This will create the directory xfractint-20.03p02 containing the source.
You might want to change the directory name to xfractint for convenience.

You will need to have gcc, ncurses, and ncurse-develop installed.  You also
need the XFree86-libs package installed for the X11 libraries.  This package
should already be installed, but if it isn't and your distribution doesn't
have it, then you need the XFree86-devel package.

The Makefile is set up for my convenience, so if you want to put files in 
different directories, you will need to change the SRCDIR setting.  
Otherwise, just run make from the source directory and it should compile.  
Run ./xfractint to start it up.

Jonathan