Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
A free seamless background with pink spots.
Source V. Hartikainen
Prismatic Hexagonalist Pattern No Background
Source GDJ
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A new one called white wall, not by me this time.
Source Yuji Honzawa
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
Clover with background for St. Patrick's Day. Add to a card with a doily, ribbon, a leprechaun or other embellishments.
Source BAJ
A seamless background texture of old cardboard.
Source V. Hartikainen
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen