Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Prismatic Geometric Pattern Background
Source GDJ
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Sort of reminds me of those old house wallpapers.
Source Tish
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
A new one called white wall, not by me this time.
Source Yuji Honzawa
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen