A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Prismatic Groovy Concentric Background 3
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen