Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
8 by 8 pixels, and just what the title says.
Source pixilated
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
To get the repeating unit, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamlessly tile-able grunge background image.
Source V. Hartikainen
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Colorful Floral Background 3 No Black
Source GDJ