Book of Shapes

These are starting points you can change, not just patterns to admire. Flow Dots alone lets you tune turbulence, spacing, dot size, and the number of strands.

SVG downloads and a Copy for Figma option give all that tinkering somewhere useful to go.

Nikolaj Sokolowski's collection ranges from orderly grids to organic shapes and distortion. There is even an explanation beneath each pattern when you want to understand the trick.