Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Prismatic Floral Background No Black
Source GDJ
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Derived from a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
To get the repeating unit, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
Prismatic Polyskelion Pattern No Background
Source GDJ
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Prismatic Geometric Pattern Background No Black
Source GDJ
Colour version of the original pattern.
Source Firkin
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A heavy hitter at 400x400px, but lovely still.
Source Breezi