The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Here's a new paper-like background for free use on personal and commercial projects (this applies to all background patterns here).
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A new one called white wall, not by me this time.
Source Yuji Honzawa
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
Classic 45-degree pattern, light version.
Source Luke McDonald
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin