A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
A cute x, if you need that sort of thing.
Source Juan Scrocchi
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Spice up your next school project with this icon background.
Source Swetha
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry