The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A tile-able background for websites with paper-like texture and a grid pattern layered on top of it.
Source V. Hartikainen
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Colourful background achieved with gradient fills.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
There are many carbon patterns, but this one is tiny.
Source Designova
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
The image depicts a seamless pattern which was made using stripe-like things including borders.I used OCAL cliparts called "Blue Greek Key With Lines Border" uploaded by "GR8DAN" and "daisy border" uploaded by "johnny_automatic".Thanks.
Source Yamachem
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin