Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin