Dark blue concrete wall with some small dust spots.
Source Atle Mo
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
The image is a seamless pattern of a fishnet.
Source Yamachem
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
This could be a hippy vintage wallpaper.
Source Tileable Patterns
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Sort of reminds me of those old house wallpapers.
Source Tish
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
This metal background pattern resembles a metal plate with rivets. Solid rivets on a metal plate.
Source V. Hartikainen
A version without colours blended together to give a different look.
Source Firkin