Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
You guessed it – looks a bit like cloth.
Source Peax Webdesign
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Zero CC asphalt, pavement, texture, photographed and made by me. CC0 WARNING I FOUND A SEAM ON THIS TEXTURE
Source Sojan Janso
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Prismatic Polka Dots Mark II No Background
Source GDJ
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry