Almost like little fish shells, or dragon skin.
Source Graphiste
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Alternative colour scheme to the original.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
Subtle scratches on a light gray background.
Source Andrey Ovcharov