A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Prismatic Groovy Concentric Background 5
Source GDJ
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Classic 45-degree pattern, light version.
Source Luke McDonald
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective