Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Abstract Tiled Background Extended 8
Source GDJ
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin