I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
A browner version of the original weathered fence texture.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Sometimes you just need the simplest thing.
Source Fabricio
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
The original enhanced with some gradients.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
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
Prismatic Polka Dots 3 No Background
Source GDJ
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ