Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
An abstract pale yellow paper-like background with stains colored in yellow and green.
Source V. Hartikainen
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
This could be a hippy vintage wallpaper.
Source Tileable Patterns
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Sharp pixel pattern, just like the good old days.
Source Paridhi
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Sharp but soft triangles in light shades of gray.
Source Pixeden
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.
Source V. Hartikainen
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin