This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
This is the remix of "blue wave-seigaiha".The image depicts a seamless pattern of the front upper part of Japanese five yen coin which is used currently.This design represents a rice with ripe golden ears.
Source Yamachem
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
This white background pattern has a seamless grunge style texture. Here's a white grunge style background pattern. Use it as a tiled background image on web sites or for other purposes.
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
The image is the remix of "wire-mesh fence seamless pattern" .This is a more minute version of it.Sorry for the file size.Using path>difference in Inkscape, I will cut out any silhouette from this pattern and create a "meshed silhouette".
Source Yamachem
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin