Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Neat little photography icon pattern.
Source Hossam Elbialy
A new one called white wall, not by me this time.
Source Yuji Honzawa
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk