Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
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
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Plywood Web Background background image for use in web design.
Source V. Hartikainen
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Neat little photography icon pattern.
Source Hossam Elbialy
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen