A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
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
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight