Embossed lines and squares with subtle highlights.
Source Alex Parker
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Number five from the same submitter, makes my job easy.
Source Dima Shiper
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
Prismatic Geometric Pattern Background 2
Source GDJ
A seamless pattern formed from background pattern 102
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This is the remix of "blue wave-seigaiha".The image depicts a seamless pattern of the front upper part of Japanese five yen coin which is used currently.This design represents a rice with ripe golden ears.
Source Yamachem
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Prismatic Groovy Concentric Background 5 No Black
Source GDJ