From an image on opengameart.org shared by rubberduck.
Source Firkin
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
If you want png files of thisu can download them here :
Source Viscious-Speed
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering