This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Derived from a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso
This was formed by distorting an image of a background on Pixabay.
Source Firkin
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens