An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Subtle scratches on a light gray background.
Source Andrey Ovcharov
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Tiny circle waves, almost like the ocean.
Source Sagive
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen