A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Fix side and a seamless pattern formed from circles.
Source SliverKnight
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
Colour version of the original pattern inspired by the front cover of 'Old and New Paris', Henry Edwards, 1894.
Source Firkin
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
A cute x, if you need that sort of thing.
Source Juan Scrocchi
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin