http://groups.yahoo.com/group/polyforms/message/4072 From: "William Rex Marshall"
Solver: Version 2 of FlatPoly (63 kB zipped) for tiling polyominoes by Aad van de Wetering (in Dutch)
See also My Puzzle Note 1.a My Puzzle Note 1.1.a My Puzzle Note 1.2.1 My Puzzle Note 1.3 2005/02/07 added