Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
A version without colours blended together to give a different look.
Source Firkin
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Embossed lines and squares with subtle highlights.
Source Alex Parker
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Remixed from a drawing in 'Incidents on a Journey through Nubia to Darfoor', F. Ensor, 1891.
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
You guessed it – looks a bit like cloth.
Source Peax Webdesign
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra