I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
A seamless pattern formed from a square tile based on a jpg on Pixabay. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
The original enhanced with one of Inkscapes's filters.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A seamless texture of worn out "cardboard".
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
A white version of the very popular linen pattern.
Source Ant Ekşiler
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin