Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Groovy Concentric Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Here's a new paper-like background for free use on personal and commercial projects (this applies to all background patterns here).
Source V. Hartikainen
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Prismatic Abstract Background Design
Source GDJ
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.
Source V. Hartikainen
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
A seamless texture of a rough concrete surface.
Source V. Hartikainen
Prismatic Hexagonalism Pattern No Background
Source GDJ
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Prismatic Abstract Line Art Pattern Background
Source GDJ
A free seamless background with pink spots.
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen