Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Sharp pixel pattern, just like the good old days.
Source Paridhi
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
A seamless paper background colored in pale yellow.
Source V. Hartikainen
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media