Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
Sharp but soft triangles in light shades of gray.
Source Pixeden
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Colourful background achieved with gradient fills.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use 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
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin