Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Prismatic Snowflakes Pattern No Background
Source GDJ
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen