CC0 and seamless wellington boot pattern.
Source SliverKnight
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A free background pattern with abstract green tiles.
Source V. Hartikainen
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
This is a hot one. Small, sharp and unique.
Source GraphicsWall
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Seamless Green Tile Background
Source V. Hartikainen
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by Osckar
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
Prismatic Abstract Line Art Pattern Background 2
Source GDJ