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
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Spice up your next school project with this icon background.
Source Swetha
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ