Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
The original enhanced with some gradients.
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
A bit strange this one, but nice at the same time.
Source Diogo Silva
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Original minus the background
Source Firkin
Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
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
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov