Might not be super subtle, but quite original in its form.
Source Alex Smith
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Prismatic Abstract Geometric Background 4
Source GDJ
Looks like an old wall. I guess that’s it then?
Source Viahorizon
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
A white version of the very popular linen pattern.
Source Ant Ekşiler
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Derived from a drawing in 'Historiske Afhandlinger', Adolf Jorgensen, 1898.
Source Firkin
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor