A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Abstract Tiled Background Extended 12
Source GDJ
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Remixed from a drawing in 'Очерки Русской Исторіи въ памятникахъ быта', Petr Polevoi, 1879.
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Use shift+alt+i on the selected rectangle in Inkscape to get the tile this is based on
Source Firkin
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine