I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
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
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
A white version of the very popular linen pattern.
Source Ant Ekşiler
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Retro Circles Background 7 No Black
Source GDJ
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Incidents on a Journey through Nubia to Darfoor', F. Ensor, 1891.
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 free pink background pattern.
Source V. Hartikainen
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo