This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Classic vertical lines, in all its subtlety.
Source Cody L
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
I’m not going to use the word Retina for all the new patterns, but it just felt right for this one. Huge wood pattern for ya’ll.
Source Atle Mo
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
A new one called white wall, not by me this time.
Source Yuji Honzawa
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous