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
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Gold Triangular Seamless Pattern No Background
Source GDJ
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Run a restaurant blog? Here you go. Done.
Source Andrijana Jarnjak
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin