Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
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
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A nice and simple white rotated tile pattern.
Source Another One
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ