A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Background formed from the original with an emboss effect
Source GDJ