A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso