Black brick wall pattern. Brick your site up!
Source Alex Parker
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
An abstract web texture of a polished blue stone (or does it look more like ice).
Source V. Hartikainen
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
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
A seamless texture of a rough concrete surface.
Source V. Hartikainen
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
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Old China with a modern twist, take two.
Source Adam Charlts
Prismatic Curved Diamond 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
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Prismatic Polka Dots 3 No Background
Source GDJ
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Colourful background achieved with gradient fills.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo