The image is a seamless pattern of a fishnet.
Source Yamachem
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Abstract Tiled Background Extended 11
Source GDJ
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Might not be super subtle, but quite original in its form.
Source Alex Smith
Element of beach pattern with background.
Source Rones
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Gold Triangular Seamless Pattern No Background
Source GDJ
Same classic 45-degree pattern, dark version.
Source Luke McDonald
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov
Tile-able Dark Brown Wood Background. Feel free to use it as a background image in your designs or somewhere on the web. By the way, the color seems to be close to Coffee Brown.
Source V. Hartikainen
Prismatic Groovy Concentric Background
Source GDJ
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
A seamlessly tile-able grunge background image.
Source V. Hartikainen
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin