From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
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
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Prismatic Abstract Geometric Background 5
Source GDJ
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo