Prismatic Polyskelion Pattern No Background
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Looks like an old wall. I guess that’s it then?
Source Viahorizon
A seamless texture of worn out "cardboard".
Source V. Hartikainen
Prismatic Groovy Concentric Background
Source GDJ
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Continuing the geometric trend, here is one more.
Source Mike Warner
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
There are many carbon patterns, but this one is tiny.
Source Designova
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso