This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Crossing lines on a light background.
Source Daivid Serif
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
It’s big, it’s gradient—and it’s square.
Source Brankic1979
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
A free seamless background with pink spots.
Source V. Hartikainen
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
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
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Turn your site into a dragon with this great scale pattern.
Source Alex Parker