I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Prismatic Snowflakes Pattern No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Continuing the geometric trend, here is one more.
Source Mike Warner
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
An alternative colour scheme for the original seamless texture formed from an image on Pixabay.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo