The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Psychedelic Geometric Background No Black
Source GDJ
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Prismatic Groovy Concentric Background No Black
Source GDJ
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
A new take on the black linen pattern. Softer this time.
Source Atle Mo
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A new one called white wall, not by me this time.
Source Yuji Honzawa
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin