A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
A bit strange this one, but nice at the same time.
Source Diogo Silva
A seamless web texture of "green stone".
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
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Retro Circles Background 5 No Black
Source GDJ
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
A repeating background with a look of paper. I have added some changes to PatCreator. Now you can share your designs by submitting them to a new gallery section. Start by clicking Edit with PatCreator above.
Source V. Hartikainen
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
This is a remix of "flower seamless pattern".I rotated the original image by 90 degrees.This is a seamless pattern of flowers.These horizontal wavy lines are one of Edo patterns which is called "tatewaku or tachiwaku or 立湧" that represents uprising steam or vapor.
Source Yamachem