Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Retro Circles Background 7 No Black
Source GDJ
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
The image is the remix of "wire-mesh fence seamless pattern" .This is a more minute version of it.Sorry for the file size.Using path>difference in Inkscape, I will cut out any silhouette from this pattern and create a "meshed silhouette".
Source Yamachem
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
A browner version of the original weathered fence texture.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin