This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
A seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
White circles connecting on a light gray background.
Source Mark Collins
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from a drawing in 'Historiske Afhandlinger', Adolf Jorgensen, 1898.
Source Firkin
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
You may use it as is, or modify it as you like.
Source V. Hartikainen
A new take on the black linen pattern. Softer this time.
Source Atle Mo