Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
White handmade paper pattern with small bumps.
Source Marquis
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Abstract Tiled Background Extended 6
Source GDJ
Prismatic Groovy Concentric Background
Source GDJ
More in the paper realm, this time with fibers.
Source Jorge Fuentes
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
"Beige Stone", Tileable Texture.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin