This background texture resembles stone. It may be used as a background on web pages or on some of their html elements (header, borders, menu bar, etc.). Just modify it for your needs.
Source V. Hartikainen
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Derived from a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Prismatic Groovy Concentric Background
Source GDJ
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne