Forty knots- I have this placard. Taught Cub Scouts some of the easier knots for years using this. A good visual aid.
Tutorials | IGKT Circular Rope Mat
Macrame knots - Site is in Hebrew, use Google Translate.
Flower knot made with 8 cross knots and pan-chang knot..... photo only
butterfly, Dual climbing - mifor - the Lanting Junction Arts
Rectangle 08 Embroidery or cross stitch, but could also work for filet crochet.
Chart for cross stitch or filet crochet.
136 Mermaid Filet Crochet Doily Afghan Curtain Pattern | CROCHETBYDASMADE - Patterns on ArtFire