From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
Fix and cc0 to get the tile this is based on.
Source SliverKnight
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Abstract Ellipses Background Grayscale
Source GDJ
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
An alternative colour scheme to the original seamless pattern.
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Black And White Floral Pattern Background Inverse
Source GDJ
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Embossed lines and squares with subtle highlights.
Source Alex Parker
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
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
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
This one is amazing, truly original. Go use it!
Source Viahorizon