The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
I’m not going to lie – if you submit something with the words Norwegian and Rose in it, it’s likely I’ll publish it.
Source Fredrik Scheide
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain