This was formed by distorting an image of a background on Pixabay.
Source Firkin
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
This one needs to be used in small areas; you can see it repeat.
Source Luca
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
An abstract web texture of a polished blue stone (or does it look more like ice).
Source V. Hartikainen
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Curved Diamond Pattern No Background
Source GDJ
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
8 by 8 pixels, and just what the title says.
Source pixilated
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov