A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Prismatic Polka Dots Mark II No Background
Source GDJ