From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Almost like little fish shells, or dragon skin.
Source Graphiste
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba