Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Sharp but soft triangles in light shades of gray.
Source Pixeden
Prismatic Abstract Geometric Background 2
Source GDJ
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
An abstract web texture of a polished blue stone (or does it look more like ice).
Source V. Hartikainen
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
This one needs to be used in small areas; you can see it repeat.
Source Luca