A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Original minus the background
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin