Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
A seamless marble-like texture colored in light blue.
Source V. Hartikainen
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
From a drawing in 'An Old Maid's Love. A Dutch tale told in English', Maarten Maartens, 1891.
Source Firkin
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo