A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Almost like little fish shells, or dragon skin.
Source Graphiste
You may use it as is, or modify it as you like.
Source V. Hartikainen
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This one has rusty dark brown texture.
Source V. Hartikainen
Light and tiny, just the way you like it.
Source Rohit Arun Rao
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A black tile-able background with paper-like texture.
Source V. Hartikainen
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen