A comeback for you: the popular Escheresque, now in black.
Source Patten
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
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
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
A repeating background with a look of paper. I have added some changes to PatCreator. Now you can share your designs by submitting them to a new gallery section. Start by clicking Edit with PatCreator above.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
A cute x, if you need that sort of thing.
Source Juan Scrocchi
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
Just like the black maze, only in light gray. Duh.
Source Peax
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The base gradient edited so now more details are rendered.
Source Lazur URH
The image depicts a shell seamless pattern.I used an OCAL clipart called "Shell" uploaded by "jgm104".Thanks.
Source Yamachem