From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
Background formed from the original with an emboss effect
Source GDJ
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Abstract Tiled Background Extended 6
Source GDJ
From a drawing in 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A free background image with a seamless texture of cardboard. This texture of cardboard looks quite realistic, especially when is actually tiled.
Source V. Hartikainen
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
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
Prismatic Basic Pattern 2 No Background
Source GDJ
Might not be super subtle, but quite original in its form.
Source Alex Smith
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev