This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Remixed from a vector adapted from a jpg on Pixabay. The tile this is constructed from can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
White circles connecting on a light gray background.
Source Mark Collins
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Prismatic Polka Dots 3 No Background
Source GDJ
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Sharp but soft triangles in light shades of gray.
Source Pixeden
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin