I recently ran across AnimatedKnots.com, and due to always having a soft spot for knot-tying (but absolutely no talent for it), thought it was fairly interesting. They get a gold star for being — as the name suggests — animated, which is a lot more useful than the majority of reference materials around. Most of the ‘animations’ are short (<10 frame) photo series, showing the construction of each. There’s also the ability to step slowly through the procedure, which is nice if you’re slow, like I am.

The site requires JavaScript and is probably best if you actually have a piece of rope to follow along with.

It surprises me a little, given how superior animations are to static images at teaching a skill like this, that such a site didn’t get created a long time ago, but it looks fairly new.