Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
A new one called white wall, not by me this time.
Source Yuji Honzawa
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.
Source V. Hartikainen