Boating Knots - Covers several knots commonly used in boating.
Boating Magazine - Pictures and instructions on how to tie a few knots.
Shooting Star's Marlinspike Page - Covers common boating knots including the Anchor bend, the Carrick bend, the Buntline hitch, and several variations of the Bowline. Animated illustrations and step-by-step instructions. Table showing the relative strength of the knots.