This could be a hippy vintage wallpaper.
Source Tileable Patterns
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A comeback for you: the popular Escheresque, now in black.
Source Patten
A bit strange this one, but nice at the same time.
Source Diogo Silva
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Almost like little fish shells, or dragon skin.
Source Graphiste
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
Prismatic Geometric Pattern Background No Black
Source GDJ
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A bit of scratched up grayness. Always good.
Source Dmitry