The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
Prismatic Curved Diamond Pattern No Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Prismatic Polka Dots 3 No Background
Source GDJ
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin