Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a PNG that was uploaded to Pixabay by gingertea
Source Firkin
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Looks like an old rug or a computer chip.
Source Patutin Sergey
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
The texture of this background image has some similarities with leather, and it's colored in a dark brown color. So, if you are looking for a dark brown background image for your website, this may be an option for you.
Source V. Hartikainen
Prismatic Groovy Concentric Background 2
Source GDJ
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
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
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
A seamlessly tileable pink background texture.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
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
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin