This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
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
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Inspired by a JPG that was uploaded to Pixabay by kokon_art
Source Firkin