Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
From an image on opengameart.org shared by rubberduck.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-yellow.
Source Yamachem
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
The image depicts a shell seamless pattern.I used an OCAL clipart called "Shell" uploaded by "jgm104".Thanks.
Source Yamachem
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
Fix and cc0 to get the tile this is based on.
Source SliverKnight
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin