This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
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
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male