A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry