A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
Prismatic Hexagonalist Pattern No Background
Source GDJ
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Remixed from a drawing in 'Kulturgeschichte der Deutschen im Mittelalter' Franz von Loeher, 1891. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin