The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
This one needs to be used in small areas; you can see it repeat.
Source Luca
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Continuing the geometric trend, here is one more.
Source Mike Warner
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Alternative colour scheme for the original floral pattern.
Source Firkin
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Original minus the background
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts