A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
A seamlessly tileable pink background texture.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Embossed lines and squares with subtle highlights.
Source Alex Parker
Tiny circle waves, almost like the ocean.
Source Sagive
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin