Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A bit of scratched up grayness. Always good.
Source Dmitry
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Just like the black maze, only in light gray. Duh.
Source Peax
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
This was formed by distorting an image of a background on Pixabay.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin