From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
8 by 8 pixels, and just what the title says.
Source pixilated
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
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
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
White circles connecting on a light gray background.
Source Mark Collins
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Classic vertical lines, in all its subtlety.
Source Cody L
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg