The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:https://jp.pinterest.com/pin/500744052301423641/
Source Yamachem
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Old China with a modern twist, take two.
Source Adam Charlts
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
A free pink background pattern.
Source V. Hartikainen
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
A version without colours blended together to give a different look.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ