A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
The image depicts a tiled seamless pattern.The tile represents four leaves aligned every 90 ° , which may look like a bird or a dragon .The original leaf design is from a Japanese old book.
Source Yamachem
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus