Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from a drawing in 'An Index to Deering's Nottinghamia Vetus et Nova', Rupert Chicken, 1899. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
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 frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Colour version of the original seamless pattern.
Source Firkin
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Prismatic Abstract Geometric Background 4
Source GDJ