Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
A seamless background tile of aged paper with shabby look.
Source V. Hartikainen
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
A yellow tiled background... Blurriness, bokeh effect and rectangles pattern in one mix.
Source V. Hartikainen
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen