After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Prismatic Abstract Background Design
Source GDJ
Colourful background achieved with gradient fills.
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Sharp pixel pattern, just like the good old days.
Source Paridhi
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
A new one called white wall, not by me this time.
Source Yuji Honzawa
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
A seamless background texture of old cardboard.
Source V. Hartikainen
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov