Prismatic Polyskelion Pattern No Background
Source GDJ
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A seamless background texture of old cardboard.
Source V. Hartikainen
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
A seamless pattern formed from background pattern 102
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
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
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper