From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
Black And White Floral Pattern Background from PDP.
Source GDJ
Colorful Floral Background 3 No Black
Source GDJ
A free background pattern with abstract green tiles.
Source V. Hartikainen
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A seamless pattern formed from background pattern 102
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter