From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
The tile for this is based on a repeating unit close to a design on Pixabay. It can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
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 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars