1)   NonoGrid 1.0.1
NonoGrid is a puzzle game that lets you play and solve nonograms/griddlers on your computer. Nonograms are logic puzzles, in which you need to uncover a picture consisting of black and white squares.

 2)   World of CryptoPics 1.4
CryptoPics (or Nonograms/Griddlers) are logic puzzles in which the aim is to reveal a hidden picture from the number clues. Play picture puzzles, random puzzles, puzzles created from image files and the unique Challenge Mode. Includes Editor.

 3)   Japan Riddles 1.54
Japan Riddles is a computer variant of popular puzzles known as Nonograms, Griddlers, Paint by Numbers or Japan Crossword Puzzles. Goal is to draw a picture discovering what cells to paint based on numbers on the left and top of the picture.

 4)   Japan Crossword Editor 1.21.2.0
User-friendly and powerful editor of Japan crosswords enables to draw and come out crosswords by own means, import files-pictures into crossword as well as export into pictures, protect saved files with crosswords by a password.