People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
Colour version of the original pattern.
Source Firkin
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
A free background pattern with abstract green tiles.
Source V. Hartikainen
Colour version of the original seamless pattern.
Source Firkin
Prismatic Geometric Pattern Background No Black
Source GDJ