Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Might not be super subtle, but quite original in its form.
Source Alex Smith
A nice and simple white rotated tile pattern.
Source Another One
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
Colorful Floral Background No Black
Source GDJ
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless texture of worn out "cardboard".
Source V. Hartikainen
Retro Circles Background 8 No Black
Source GDJ
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Green Background Pattern
Source V. Hartikainen
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
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin