Guenter Buehler's Pentomino site, "Logical Art and the Art of Logic" essential for all pentomino addicts, includes a downloadable pentomino program, and several unusual galleries of thought provoking pentomino inspired art!

Gerard Putters amazing pentomino/polyonimo site. It includes a universal java pentomino solver. It is great fun to use, and if like me you solved all the pentomino problems by hand, it will make mincemeat out of a whole chunk of your life!

The students of KSO Glorieux Ronse in Belgium have put together a really useful pentomino site. It is well worth the visit. The links here will also take you on to some most extraordinary sites.