I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Prismatic Groovy Concentric Background No Black
Source GDJ
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
The image depicts polka dot seamless pattern.
Source Yamachem
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Polka Dots Mark II No Background
Source GDJ
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin