This was formed by distorting an image of a background on Pixabay.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
From a drawing in 'Prose and Verse ', William Linton, 1836.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin