A version without colours blended together to give a different look.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Black And White Floral Pattern Background Inverse
Source GDJ
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Zero CC tileable yellow craft paper; scanned and made by me. CC0
Source Sojan Janso
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran