It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Looks like an old rug or a computer chip.
Source Patutin Sergey
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Continuing the geometric trend, here is one more.
Source Mike Warner
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
One more sharp little tile for you. Subtle circles this time.
Source Blunia
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
The image depicts a seamless pattern which was made using stripe-like things including borders.I used OCAL cliparts called "Blue Greek Key With Lines Border" uploaded by "GR8DAN" and "daisy border" uploaded by "johnny_automatic".Thanks.
Source Yamachem
Abstract Ellipses Background Grayscale
Source GDJ
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin