This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Alternative colour scheme. 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
Prismatic Curved Diamond Pattern No Background
Source GDJ
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin