Might not be super subtle, but quite original in its form.
Source Alex Smith
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
A seamless pattern formed from a tile made from ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo