Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin