Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
A nice and simple white rotated tile pattern.
Source Another One
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
This one has rusty dark brown texture.
Source V. Hartikainen
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin