A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Prismatic Hexagonalist Pattern No Background
Source GDJ
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
"Beige Stone", Tileable Texture.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Green Web Background, Seamless tile.
Source V. Hartikainen
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:https://jp.pinterest.com/pin/500744052301423641/
Source Yamachem
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Abstract Ellipses Background Grayscale
Source GDJ
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.
Source V. Hartikainen
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ