A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
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
Looks like an old rug or a computer chip.
Source Patutin Sergey
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen