Number five from the same submitter, makes my job easy.
Source Dima Shiper
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A bit of scratched up grayness. Always good.
Source Dmitry
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Black brick wall pattern. Brick your site up!
Source Alex Parker
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic