Might not be super subtle, but quite original in its form.
Source Alex Smith
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
This seamless web background texture looks like gray stone. It's great for using as a background image on web pages, or on some of their elements. Anyway, I hope you will find use for it.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
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
You know you love wood patterns, so here’s one more.
Source Richard Tabor