CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
A seamless background texture of old cardboard.
Source V. Hartikainen
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Prismatic Groovy Concentric Background
Source GDJ
This one is amazing, truly original. Go use it!
Source Viahorizon
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
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
This one needs to be used in small areas; you can see it repeat.
Source Luca
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A bit strange this one, but nice at the same time.
Source Diogo Silva
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin