A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Similar to original, but without gaps in between the arrows. This seamless pattern was created from a rectangular tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Retro Circles Background 5 No Black
Source GDJ
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
White handmade paper pattern with small bumps.
Source Marquis
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Here is a new seamless wood texture for using as blog or website backgrounds.
Source V. Hartikainen
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
The classic notebook paper with horizontal stripes.
Source Are Sundnes
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
Prismatic Groovy Concentric Background 2 No Black
Source GDJ