https://notableknotindex.webs.com/
contains a short list of knots along with insightful comments on their use. Some, like the Slipped Buntline Hitch, show alternative forms to alleviate deficiencies (jamming in this case) or for different use cases. One of my favorites is the Versatacle, which provides a pulley like mechanical advantage. It's been my go-to tensioning knot since learning about it. Animated Knots is great for understanding the form of knots like the Zepplin Bend, and I use both sites when learning a new knot or brushing up on an old one.