A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
Dark blue concrete wall with some small dust spots.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
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 simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib