This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Seamless Green Tile Background
Source V. Hartikainen
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
This background has abstract texture with some similarities to wood.
Source V. Hartikainen