Number five from the same submitter, makes my job easy.
Source Dima Shiper
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
Abstract Ellipses Background Grayscale
Source GDJ
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin