Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
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
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
A background pattern with a look of rough fabric.
Source V. Hartikainen
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
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo