A Windows program that ties virtual Turk's Heads and Ball knots on a virtual Former.
Download THFormer.exe, doubleclick the icon to run, then pull down the Help menu and click on Aboutfor instructions on how to use the program. The program can be used to print out diagrams for a couple of stages of a knot which can then be used for reference when tying the actual knot.
A free tool for drawing knots.
Developed by Derek Smith and Dave Root.