CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Run a restaurant blog? Here you go. Done.
Source Andrijana Jarnjak
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso