Robert Stegmann  The Best Collectors page
http://robspuzzlepage.com

Richard Whiting
http://www.puzzlegrail.com/

Bill Cutler
http://www.billcutlerpuzzles.com/

Jaap's Puzzle Page
http://www.jaapsch.net/puzzles/

Doug Engel
http://www.puzzleatomic.com/

Could be the most important Puzzle of all.
http://shroud.com/

Tom Cutrofello A Teacher and Puzzle Designer
http://www.gottasolveit.com

Live Wire Puzzles
http://www.puzzles.ca

More BEAUTIFUL WIRE PUZZLES
http://www.sonic.net/fiddlwid/

Nick Baxter
http://www.puzzleworld.org/slidingblockpuzzles/ 

Pubelo Colorado
http://www.homeofheroes.com/

BEAUTIFUL WIRE PUZZLES
http://www.puzzlemaster.ca

Leonid Mochalov
http://www.puzzlemochalovlp.com

Edgar Gueto Sliding block puzzles
http://www.puzzlopia.com