A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
A dark striped seamless pattern suitable for use as a background on websites.
Source V. Hartikainen
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Looks like an old rug or a computer chip.
Source Patutin Sergey
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
8 by 8 pixels, and just what the title says.
Source pixilated
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
This is a hot one. Small, sharp and unique.
Source GraphicsWall
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Sharp but soft triangles in light shades of gray.
Source Pixeden
Sort of reminds me of those old house wallpapers.
Source Tish
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein