Online Tsunami (Popularity: )

Create, edit, and play Japanese Tsunami puzzles in black and white or color. Includes playable puzzles created by others, hints, and solutions.

Griddlers.net (Popularity: )

Offers member-created puzzles ranging in complexity from two to eight colors for online play or to print out. Free registration required.

Activity Workshop (Popularity: )

An introduction to nonograms and how to solve them, including puzzles to solve online.

Paint By Numbers (Popularity: )

Offers two color puzzles ranging from 10x10 to 40x40. Free registration required to solve online or create puzzles.

Japan Riddles (Popularity: )

Contains game downloads with expansion packs and play instructions.

Japanolle (Popularity: )

Play online or download puzzle-solving software for PC.