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
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
I’m not going to use the word Retina for all the new patterns, but it just felt right for this one. Huge wood pattern for ya’ll.
Source Atle Mo
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Might not be super subtle, but quite original in its form.
Source Alex Smith
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
To get the repeating unit, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Just like the black maze, only in light gray. Duh.
Source Peax
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett