CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
This was formed by distorting an image of a background on Pixabay.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin