A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
"Beige Stone", Tileable Texture.
Source V. Hartikainen
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
Used a cherry by doctormo to make this seamless pattern
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Prismatic Curved Diamond Pattern No Background
Source GDJ
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Prismatic Abstract Background Design
Source GDJ
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin