A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
From an image on opengameart.org shared by rubberduck.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
This background image is great for using in web design or graphic design projects. And don't forget to visit the homepage. I frequently update this resource with fresh tileable backgrounds.
Source V. Hartikainen
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Green Web Background, Seamless tile.
Source V. Hartikainen
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.
Source V. Hartikainen
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
This could be a hippy vintage wallpaper.
Source Tileable Patterns
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Oh yes, it happened! A pattern in full color.
Source Atle Mo