This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This is a hot one. Small, sharp and unique.
Source GraphicsWall
Inspired by the B&O Play, I had to make this pattern.
Source Atle Mo
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Green Web Background, Seamless tile.
Source V. Hartikainen
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Prismatic Hexagonalism Pattern No Background
Source GDJ
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen