A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
A comeback for you: the popular Escheresque, now in black.
Source Patten
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Seamless pattern formed from a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Black brick wall pattern. Brick your site up!
Source Alex Parker
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A bit strange this one, but nice at the same time.
Source Diogo Silva
Colorful Floral Background 3 No Black
Source GDJ
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.