Knot Dice are beautiful dice adorned with Celtic knots, designed by Matthew O'Malley. They come with a book of multiple games. You can play thinky and cooperative, fast and competitive, solve dozens of solo puzzles, or just leave them sitting out in pretty designs.
In the expansion Knot Dice Squared, I co-designed one of several games in the booklet. It's a small contribution, but it seemed worth mentioning here because I think more people should discover these lovely dice!
Available from Black Oak Games.