A comeback for you: the popular Escheresque, now in black.
Source Patten
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
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
A free background pattern with abstract green tiles.
Source V. Hartikainen
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Retro Circles Background 7 No Black
Source GDJ
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Zero CC tileable yellow craft paper; scanned and made by me. CC0
Source Sojan Janso
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
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
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin