Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
The tile can be had by selecting the rectangle in Inkscape and using shift+alt+i. Remixed from a drawing in 'Flowers of Song', Frederick Weatherly, 1895.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
The base gradient edited so now more details are rendered.
Source Lazur URH
It’s a subtle zebra, in 3D. Oh yes!
Source Mike Warner
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin