xfdiff: xfdiff - graphic interface to diff and patch commands
xfdiff:  
xfdiff: Xfdiff is a graphical interface to the GNU diff and patch commands. 
xfdiff: With this utility, you can view differences side by side for files 
xfdiff: or directories. You can also view differences that applying a patch 
xfdiff: file would imply, without applying the patch. You can also apply 
xfdiff: patches to the hard disc or create patch files for differences 
xfdiff: between files or directories. All-in-all, a handy utility for those
xfdiff: who don't want to type the diff command! 
xfdiff: 
xfdiff: http://xffm.sourceforge.net/xfdiff.html