Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
Background formed from the original with an emboss effect
Source GDJ
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
An alternative colour scheme to the original seamless pattern.
Source Firkin
To get the repeating unit, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Colour version of the original pattern.
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein