Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
A seamless texture of worn out "cardboard".
Source V. Hartikainen
A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
The image depicts a tiled seamless pattern.The tile represents four leaves aligned every 90 ° , which may look like a bird or a dragon .The original leaf design is from a Japanese old book.
Source Yamachem
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
A seamless texture of a rough concrete surface.
Source V. Hartikainen
The image depicts a seamless pattern of a snow crystal.I referred to a book called ”sekka-zusetsu” or "雪華図説" which means an illustrated explanation about snow crystals.This book was published in 1832 (天保3年) or Edo period.For more about "雪華図説",see here:dl.ndl.go.jp/info:ndljp/pid/2536975
Source Yamachem
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen
From an image on opengameart.org shared by rubberduck.
Source Firkin
Original minus the background
Source Firkin
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim