I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
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
The image depicts polka dot seamless pattern.
Source Yamachem
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Black brick wall pattern. Brick your site up!
Source Alex Parker