A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
A seamless background texture of old cardboard.
Source V. Hartikainen
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Colour version of the original seamless pattern.
Source Firkin
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Here is a new seamless wood texture for using as blog or website backgrounds.
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 good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
A comeback for you: the popular Escheresque, now in black.
Source Patten
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren