Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
A black tile-able background with paper-like texture.
Source V. Hartikainen
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
The image is a seamless pattern of a fishnet.
Source Yamachem