Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Prismatic Basic Pattern 2 No Background
Source GDJ
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski