A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
A repeating background with wood/straw like texture.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
This background image is great for using in web design or graphic design projects. And don't forget to visit the homepage. I frequently update this resource with fresh tileable backgrounds.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward