A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Number five from the same submitter, makes my job easy.
Source Dima Shiper
From an image on opengameart.org shared by rubberduck.
Source Firkin
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
More in the paper realm, this time with fibers.
Source Jorge Fuentes
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
A seamless texture of a rough concrete surface.
Source V. Hartikainen
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin