To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A blue gray fabric-like texture for websites. An yet another fabric-like texture. It has subtle vertical and diagonal stripes to it.
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A seamlessly tile-able grunge background image.
Source V. Hartikainen
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
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
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen