Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
This is a remix of "geometrical pattern 01".
Source Yamachem
Prismatic Groovy Concentric Background 2
Source GDJ
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
Black & white version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
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
Prismatic Groovy Concentric Background No Black
Source GDJ
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
Someone was asking about how to achieve a fur pattern at #inkscape irc so tried to make a filter on it. Flood filled fractal noises rigged together. May someone find a good use for these.
Source Lazur URH
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
A seamless background texture of old cardboard.
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez