A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Looks like an old wall. I guess that’s it then?
Source Viahorizon
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin