Paint by Numbers (Popularity: )

Offers two color puzzles available to print out or solve online.

Conceptis Puzzles (Popularity: )

Creator and supplier of picture-forming logic puzzles. Contains online games and those for sale from Japan.

Solving Paint-by-Numbers Puzzles with Integer Programming (Popularity: )

Article and instructions on solving puzzles.

Elite Japan Crossword (Popularity: )

Downloadable software for solving paint by numbers puzzles in many formats, including plain black and white bitmap files. Also has a solving tutorial.

The Jcwd (Popularity: )

The programs for creating and solving Japanese crosswords.