People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
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 nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem