To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Retro Circles Background 8 No Black
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
Prismatic Polka Dots 3 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav