CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
A background pattern with a look of rough fabric.
Source V. Hartikainen
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Prismatic Hypnotic Pattern No Background
Source GDJ
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A white version of the very popular linen pattern.
Source Ant Ekşiler
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A heavy hitter at 400x400px, but lovely still.
Source Breezi
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin