A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Here is a new seamless wood texture for using as blog or website backgrounds.
Source V. Hartikainen
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
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
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Seamless pattern inspired by a drawing on Pixabay. To get the tile this is formed from, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin