I love this site so much. I learned that there are two typologies of shoelace knots -- one falls apart instantly (https://www.fieggen.com/shoelace/grannyknot.htm), and the other is as secure as a double knot. I also learned the fast way to tie shoes, https://www.fieggen.com/shoelace/ianknot.htm. The latter is fun, I have used it every day for decades and people are always amazed when you teach them.
I was fascinated by this website when I was a teenager about 17 years ago. Finding out about the Ian Knot was a "wow" moment. I've used it ever since!
I remember downloading the iOS app on my iPod Touch and being able to create your own lace pattern by dragging your fingers. Incredible stuff!
I'm very happy that the website is still up and running, preserving the same aesthetic as it had years ago.