Sort of like the Photoshop transparent background, but better!
Source Alex Parker
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
A seamlessly tile-able grunge background image.
Source V. Hartikainen
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
A seamless texture of a rough concrete surface.
Source V. Hartikainen
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Prismatic Abstract Geometric Background 4
Source GDJ
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Zero CC tileable Crackled Cement (streaks) texture, photographed and made by me. CC0
Source Sojan Janso
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The base gradient edited so now more details are rendered.
Source Lazur URH
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A free pink background pattern.
Source V. Hartikainen