A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Pattern formed from simple shapes. Black version.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
A pattern formed from repeated instances of corner decoration 8. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
This is the remix of "Colorful Floral Pattern Background 3" uploaded by "GDJ". Thanks.
Source Yamachem
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
A bit strange this one, but nice at the same time.
Source Diogo Silva
Used a cherry by doctormo to make this seamless pattern
Source Firkin