Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Derived from an image that was uploaded to Pixabay by TheDigitalArtist
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Prismatic Groovy Concentric Background
Source GDJ
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This background texture resembles stone. It may be used as a background on web pages or on some of their html elements (header, borders, menu bar, etc.). Just modify it for your needs.
Source V. Hartikainen
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter