From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin