Knots

Six Exploding Knots - Covers six knots that untie easily, including the Sliding Butterfly, Double Carrick bend, and Clove Hitch Biting a Bight. Step-by-step illustrations with instructions and a table of properties.
http://www.earlham.edu/~peters/writing/explode.htm

The Knotting Dictionary of Kännet - Covers some common and some uncommon knots, including the Reef knot, Square knot, Sheepshank, Simple Simon Over, Monkey's Fist, and Vice Versa. Illustrations and common uses. What the knot is called in other languages. User-submitted comments.
http://korpegard.se/knot/

Blue Ridge Mountain Rescue Group - Covers climbing and rescue knots including how to make a seat harness from webbing and the bowline-on-a-coil. Photos and instructions.
http://brmrg.med.virginia.edu/knots/knots.html

Ian's Shoelace Site - Illustrations and instructions. Including common, faster and more secure knots. Also a section on different methods of lacing shoes.
http://www.fieggen.com/shoelace/

Knot Tying DVD - Sells a video (VHS/DVD) showing 47 knots and 6 splices tied from the user's perspective. Also gives information on making and caring for ropes. Language and Subtitle options: English/Spanish.
http://www.knottyingvideo.com/

Sophia-Antipolis Speleogical Society - Covers common caving knots including the double figure-8 on a bight and the farmer's knot. Illustrations.
http://www-sop.inria.fr/agos-sophia/sis/Techniques/knots.html

Ruckus Society - Short climbers' knots manual.
http://ruckus.org/article.php?list=type&type=21

The Lehigh Group - Covers common marine knots, plus the Hangman's knot, the Scaffold knot, and the Gallows knot. Illustrations and common uses.
http://www.lehighgroup.com/KNOTS.HTM

Team Whiskers Knots - Catfishing Team. Includes information on baits, knots, rigs, tackle, recipes, and tournaments.
http://teamwhiskers.tripod.com/knots.html

Best Knots for Fishing and Outdoors - Illustrations and instructions for a large number of knots used in fishing, boating and paddling.
http://www.netknots.com

Ropers Knots Pages - Index of knots with links, illustrations, and descriptions.
http://www.realknots.com/

Knot Knotes - Trivia, jokes, records, projects, and games. Knot basics. Downloadable fonts.
http://whatknot.tripod.com/knots/knot.htm

Grog's Animated Knots - Knots for boating, climbing, and fishing with clear animations.
http://www.animatedknots.com/

The Prusik Knot - Discussion, comments, and tips regarding use for both sailing and climbing. History.
http://fmg-www.cs.ucla.edu/geoff/prusik_knot.html

Climerware - Analysis of the strength loss caused by using a girth hitch. Climbing variations of the girth hitch, the dogvine, the mule knot, and the Figure-8. How to tie a bowline and clove hitch one-handed.
http://www.climerware.com/knot.shtml

Knots on the Web - A collection of knotting resources.
http://www.earlham.edu/~peters/knotlink.htm

University of New England Mountaineering Club - Covers the Alpine Butterfly, Bowline, Clove hitch, and Fisherman's knot. Animation and common uses.
http://www.une.edu.au/~unemc/alpbutt.htm

Ropeworks - A book of knots, hitches, splicing, lashing and rope making.
http://www.northnet.org/ropeworks/index.html

Alrama's Knots - Animated graphics of several knots being tied.
http://alrama.tripod.com/cgi-bin/list.pl