Prismatic Hexagonalism Pattern No Background
Source GDJ
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
A free seamless background with pink spots.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
This metal background pattern resembles a metal plate with rivets. Solid rivets on a metal plate.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
A seamless web texture of "green stone".
Source V. Hartikainen
Prismatic Abstract Background Design No Black
Source GDJ
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo