As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Retro Circles Background 4 No Black
Source GDJ
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Tiny circle waves, almost like the ocean.
Source Sagive
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Colour version of the original pattern.
Source Firkin
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi