First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
Prismatic Groovy Concentric Background
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
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
Abstract Ellipses Background Grayscale
Source GDJ
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Abstract Tiled Background Extended 10
Source GDJ