A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Prismatic Triangular Background Design Mark II 5
Source GDJ
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Polyskelion Pattern No Background
Source GDJ
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
A free grid paper background pattern for using on web sites.
Source V. Hartikainen