The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Prismatic Hexagonalism Pattern No Background
Source GDJ
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A white version of the very popular linen pattern.
Source Ant Ekşiler
This one has rusty dark brown texture.
Source V. Hartikainen
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A free seamless background with pink spots.
Source V. Hartikainen
Prismatic Groovy Concentric Background No Black
Source GDJ
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
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
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
The image depicts a seamless pattern made using a bird's face.
Source Yamachem