The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Inspired by the B&O Play, I had to make this pattern.
Source Atle Mo
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Sharp pixel pattern, just like the good old days.
Source Paridhi
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Retro Circles Background 4 No Black
Source GDJ
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 seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso