Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
This one is amazing, truly original. Go use it!
Source Viahorizon
It’s big, it’s gradient—and it’s square.
Source Brankic1979
A bit strange this one, but nice at the same time.
Source Diogo Silva
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A white version of the very popular linen pattern.
Source Ant Ekşiler