A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
This is a more minute version of "fishnet 01".The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
This seamless web background texture looks like gray stone. It's great for using as a background image on web pages, or on some of their elements. Anyway, I hope you will find use for it.
Source V. Hartikainen
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
A pale olive green background with a seamless texture.
Source V. Hartikainen
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
A new one called white wall, not by me this time.
Source Yuji Honzawa