From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Seamless Green Tile Background
Source V. Hartikainen
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
This is a more minute version of "fishnet 01".The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Abstract Ellipses Background Grayscale
Source GDJ