|Brendan Owen has a site devoted to polyforms with particular emphasis on some of the more unusual and newer forms.
|Gemani Games sell sets of solid pentominoes
|Henri Picciotto's Geometric Puzzles in the Classroom gives information on various polyforms specifically designed for use with students.
|Ishino Keiichiro's site
|Juergen Koeller's site contains information of various polyforms. (German and English)
|Kadon Enterprises sell sets of polyominoes, polyiamonds and polycubes
|Kemurin's Plapuzzle Site (in Japanese and English)
|Kevin Gon's Polyominoes
|Leonid Mochalov has a puzzle site which includes some information on polyominoes. Much of the site is in Russian.
|Livecube.com has, amongst many others, pentacube puzzles for online play.
|Livio Zucca has lots of interesting data especially his own inventions - Sexehexes, Sexominoes, Xominoes and Zucca's puzzle.
|Ed Pegg Jr.'s Mathpuzzle.com has links to various data
|Miroslav Vicher's Puzzles Pages has information on most polyforms
|Martin Watson's Puzzles Homepage contains some polyform information
|William Waite's Nemmelgeb Murr Import Shop has information on various polyforms
|Peter Esser's site has a large amount of information on various polyforms.
|Jan Kok's Polyominoes: Theme and Variations has data on a number of polyforms.
|Roel Huisman has a site covering a number of polyforms particularly the domsliced forms - his own inventions.
|Yoshiya Wolf Shindo's puzzle site contains problems on box packing
|http://www.monunivers.com/pento/ (in French)
|Logelium (German and English)
|Eric Harshbarger has information on pentominoes which has some interesting problems.