From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
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
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
Classic 45-degree pattern, light version.
Source Luke McDonald
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Light and tiny, just the way you like it.
Source Rohit Arun Rao
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin