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
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.
Source V. Hartikainen
Background pattern made in "Grunge-Like" style. Available in both SVG and JPG formats. Edit to your needs then click the download button.
Source V. Hartikainen
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
A free seamless background with pink spots.
Source V. Hartikainen
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
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