Lovely pattern with some good-looking non-random noise lines.
Source Zucx
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
More in the paper realm, this time with fibers.
Source Jorge Fuentes
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
The classic notebook paper with horizontal stripes.
Source Are Sundnes
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Tiny circle waves, almost like the ocean.
Source Sagive
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
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 based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Prismatic Geometric Pattern Background No Black
Source GDJ