Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
You may use it as is, or modify it as you like.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A white version of the very popular linen pattern.
Source Ant Ekşiler
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen