This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Background pattern originally a PNG drawn in Paint.net
Source Firkin
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
There are many carbon patterns, but this one is tiny.
Source Designova
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Prismatic Abstract Background Design No Black
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Abstract Tiled Background Extended 10
Source GDJ
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Prismatic Polka Dots 3 No Background
Source GDJ
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
This one needs to be used in small areas; you can see it repeat.
Source Luca
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin