Turn your site into a dragon with this great scale pattern.
Source Alex Parker
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
A lot of people like the icon patterns, so here’s one for your restaurant blog.
Source Andrijana Jarnjak
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
The name is totally random, but hey, it sounds good.
Source Atle Mo
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin