Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
This is a hot one. Small, sharp and unique.
Source GraphicsWall
A pale olive green background with a seamless texture.
Source V. Hartikainen
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Prismatic Abstract Geometric Background 3
Source GDJ
Prismatic Groovy Concentric Background No Black
Source GDJ
This is the remix of an OCAL clipart called "Rain on Window" uploaded by "pagarmidna".Thanks.This is a seamless pattern of raindrops.
Source Yamachem
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin