Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
A free background tile with a pattern of pink bump dots. This background tile is sweet! Moreover, it's designed for use as website backgrounds.
Source V. Hartikainen
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin