The original enhanced with one of Inkscapes's filters.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
This one needs to be used in small areas; you can see it repeat.
Source Luca
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Classic vertical lines, in all its subtlety.
Source Cody L
This is so subtle you need to bring your magnifier!
Source Carlos Valdez