Neat little photography icon pattern.
Source Hossam Elbialy
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Prismatic Snowflakes Pattern No Background
Source GDJ
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Subtle scratches on a light gray background.
Source Andrey Ovcharov
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova