White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Sometimes you just need the simplest thing.
Source Fabricio
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf