The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
From an image on opengameart.org shared by rubberduck.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin