A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Inspired by a pattern I saw in a 19th century book. This seamless pattern was created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
This one needs to be used in small areas; you can see it repeat.
Source Luca
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ