Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
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 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Fix and cc0 to get the tile this is based on.
Source SliverKnight
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic Groovy Concentric Background 2
Source GDJ
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Geometric triangles seem to be quite hot these days.
Source Pixeden
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen
Might not be super subtle, but quite original in its form.
Source Alex Smith
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin