A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Almost like little fish shells, or dragon skin.
Source Graphiste
Green Background Pattern
Source V. Hartikainen
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
If you want png files of thisu can download them here :
Source Viscious-Speed
Sort of reminds me of those old house wallpapers.
Source Tish
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen