DailyPuzzler.com
Online and printable crossword puzzles, word searches, logic problems, trivia quizzes, and other word games. Order custom puzzles to give as gifts. http://www.dailypuzzler.com/
Tessellations
Maker of Puzzellations puzzles (with foam rubber tiles), posters, and kaleidoscopes inspired by M.C. Escher, as well as mathematicians like Penrose and Mandelbrot.
Mystery Writers Ltd
Details of the latest boxed and downloadable Murder Mystery Party Games with everything you need for a great murder mystery party.
Freequizzes
Sells pub trivia quizzes plus free samples for the U.K., USA, and Australia. Picture quizzes, pop music questions, and multiple choice question databases also available.
Imagination Project
Inovative puzzles and products, including officially licensed M.C. Escher tessalations.
Kadon Enterprises, Inc.
Games and puzzles like Pentominoes, Penrose Tiles, Tessellations, and other abstract strategy games.