This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
From an image on opengameart.org shared by rubberduck.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A version without colours blended together to give a different look.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Lovely pattern with splattered vintage speckles.
Source David Pomfret
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 some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Kulturgeschichte der Deutschen im Mittelalter' Franz von Loeher, 1891. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin