Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
It’s big, it’s gradient—and it’s square.
Source Brankic1979
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
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
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ