Knots 3D was mentioned as a great outdoor resource in the Springfield, Illinois newspaper The State Journal-Register
This app can help even the most helpless Scouting washout tie a proper knot in a variety of situations. Tap on the type of knot preferred, and an animation plays. The two ends of the line or rope are colored blue and red so it is easy to see how the knot is tied.
Weekend anglers and boaters need not worry about forgetting knots again.