Background formed from the original with an emboss effect.
Source Firkin
Looks like an old rug or a computer chip.
Source Patutin Sergey
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
A pattern formed from repeated instances of corner decoration 8. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
You guessed it – looks a bit like cloth.
Source Peax Webdesign
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Seamless Green Tile Background
Source V. Hartikainen
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Black brick wall pattern. Brick your site up!
Source Alex Parker
Sort of reminds me of those old house wallpapers.
Source Tish
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo