Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
A seamless pattern formed from background pattern 102
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Otis Ray Redding was an American soul singer-songwriter, record producer, arranger, and talent scout. So you know.
Source Thomas Myrman
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen