Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
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
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki