Sort of reminds me of those old house wallpapers.
Source Tish
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Prismatic Groovy Concentric Background
Source GDJ
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
Classic 45-degree pattern, light version.
Source Luke McDonald
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A free seamless background with pink spots.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza