Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
Sort of reminds me of those old house wallpapers.
Source Tish
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ