There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz