tkxcd (Tk xcleardiff look alike)
Things To Do file.

   1. Add Option menu items

   2. Add View menu items

   3. Fix bug where clicking on the page or arrow
      keys in the scrollbar do not resync the two
      sides after the link butten has been reactivated
   
   4. Add Show line number functionality

   5. Need the equivalant of the colored lines on the
      scrollbars in xcleardiff.  If I can do the scrollbar
      this will be great but otherwise I will put a 
      long thin canvas or something at the right to
      simulate the functionality.

   6. Add SCCS support

   7. Add cleardiff support

  XX. Much more