Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
The original enhanced with some gradients.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Zero CC tileable dry grass texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Embossed lines and squares with subtle highlights.
Source Alex Parker
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
Prismatic Polka Dots 3 No Background
Source GDJ
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Derived from a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin