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
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
The original has been presented as black on transparent and stored in the pattern definitions. To retrieve the unit tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
Retro Circles Background 4 No Black
Source GDJ
An abstract pale yellow paper-like background with stains colored in yellow and green.
Source V. Hartikainen
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Pattern formed from simple shapes. Black version.
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen