If you’re looking for a great resources on Knots on the web, you should go no further than Peter Suber’s “
Knots on the Web”. Divided into three main sections: Knot Tying, Knot Theory and Knot Art Peter exhaustively lists links, discussion groups, software, videos and books to help out the beginner or knot expert. Its a great site to check out when you’re sitting at the dock with a few feet of line laying around. Unfortunately some of the links are broken, but there are so many in each category you should find what you’re looking for.