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. You start out with an empty grid and you use clues and logic to find out which squares in the grid. This computer version includes 150 puzzles, and has easy correction, hints and assumptions. Includes a tutorial on solving nonograms.
Free download