This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen