Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Abstract Tiled Background Extended 6
Source GDJ
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Derived from an image that was uploaded to Pixabay by TheDigitalArtist
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Derived from a drawing in 'Historiske Afhandlinger', Adolf Jorgensen, 1898.
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler