Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Black brick wall pattern. Brick your site up!
Source Alex Parker
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
A bit strange this one, but nice at the same time.
Source Diogo Silva
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Colorful Floral Background 3 No Black
Source GDJ
From an image on opengameart.org shared by rubberduck.
Source Firkin
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
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
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
Colour version of the original pattern.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ
More in the paper realm, this time with fibers.
Source Jorge Fuentes
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim