Griddlers Deluxe - Software to play black-and-white and color pictures, as well as an editor to create custom grids. Shareware. [Windows 95/98/ME/2000/XP]
Griddlers.net - Offers member-created puzzles ranging in complexity from two to eight colors for online play or to print out. Free registration required.
Online Tsunami - Create, edit, and play Japanese Tsunami puzzles in black and white or color. Includes playable puzzles created by others, hints, and solutions.
Simplism Games: Nonosweeper - Freeware game that combines Minesweeper and Nonograms. Contains best time lists, tournament, and game information. [Windows]
The Jcwd - Japanese Crossword - Program for creating, and solving white-black and color Japanese crosswords (paint by numbers). Software comes with an archive of Japanese crosswords. [Windows 95/98/ME]