Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
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
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Psychedelic Geometric Background No Black
Source GDJ
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Prismatic Geometric Pattern Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf