Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A bit of scratched up grayness. Always good.
Source Dmitry
There are many carbon patterns, but this one is tiny.
Source Designova
It looks very nice I think.
Source V. Hartikainen
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Sharp pixel pattern, just like the good old days.
Source Paridhi
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Continuing the geometric trend, here is one more.
Source Mike Warner
Embossed lines and squares with subtle highlights.
Source Alex Parker
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH