Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
White handmade paper pattern with small bumps.
Source Marquis
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
A classic dark tile for a bit of vintage darkness.
Source Listvetra
A free grid paper background pattern for using on web sites.
Source V. Hartikainen