A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Colorful Floral Background No Black
Source GDJ
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim