An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
This could be a hippy vintage wallpaper.
Source Tileable Patterns
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a JPG that was uploaded to Pixabay by susanlu4esm
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
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
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Sort of reminds me of those old house wallpapers.
Source Tish
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Green Background Pattern
Source V. Hartikainen
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin