A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
A bit of scratched up grayness. Always good.
Source Dmitry
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens