NonoGrid

From Bitz & Pixelz Games:

NonoGrid is a puzzle game that lets you play and solve nonograms/griddlers on your computer. The easy-to-use program helps you solve nonograms without using a pencil and eraser. 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 should be black or white. The puzzle may have a title which can give you a clue as to what the final picture will be. These puzzles originated in Japan and are very popular.