Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Continuing the geometric trend, here is one more.
Source Mike Warner
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin