Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen