Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
You guessed it – looks a bit like cloth.
Source Peax Webdesign
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Prismatic Abstract Background Design
Source GDJ
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A repeating background with wood/straw like texture.
Source V. Hartikainen
This one needs to be used in small areas; you can see it repeat.
Source Luca
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
A version without colours blended together to give a different look.
Source Firkin