Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
This one is amazing, truly original. Go use it!
Source Viahorizon
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
There are many carbon patterns, but this one is tiny.
Source Designova
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
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
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin