A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Prismatic Groovy Concentric Background 3 No Black
Source GDJ