I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
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
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
A gray background pattern with a texture of textile. Suits perfectly for web design.
Source V. Hartikainen
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
White circles connecting on a light gray background.
Source Mark Collins
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Might not be super subtle, but quite original in its form.
Source Alex Smith