A bit strange this one, but nice at the same time.
Source Diogo Silva
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Fix and cc0 to get the tile this is based on.
Source SliverKnight
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A seamless texture of a rough concrete surface.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
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
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin