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
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
An alternative colour scheme to the original seamless pattern.
Source Firkin
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen