A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
This one needs to be used in small areas; you can see it repeat.
Source Luca
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
A version without colours blended together to give a different look.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Remixed from an image that was uploaded to Pixabay by Pixeline
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
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Feel free to download this "Dark Wood" background texture for your web site. The background tiles seamlessly!
Source V. Hartikainen