Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Remixed from a JPG that was uploaded to Pixabay by susanlu4esm
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.