Prismatic Chevrons Pattern 5 With Background
Source GDJ
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
Seamless Olive Green Web Background Image
Source V. Hartikainen
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
8 by 8 pixels, and just what the title says.
Source pixilated
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper