From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
An alternative colour scheme to the original seamless pattern.
Source Firkin
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
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
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter