Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
It looks very nice I think.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
Prismatic Geometric Pattern Background 2
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin