This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Prismatic Abstract Geometric Background 5
Source GDJ