A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. A version of the original with random colors.
Source Firkin
Pattern formed from simple shapes. Black version.
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton