This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
White circles connecting on a light gray background.
Source Mark Collins
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
From a drawing in 'Prose and Verse ', William Linton, 1836.
Source Firkin
This is the remix of "blue wave-seigaiha".The image depicts a seamless pattern of the front upper part of Japanese five yen coin which is used currently.This design represents a rice with ripe golden ears.
Source Yamachem
Prismatic Geometric Pattern Background 2
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Number five from the same submitter, makes my job easy.
Source Dima Shiper
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić