A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
A white version of the very popular linen pattern.
Source Ant Ekşiler
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
Neat little photography icon pattern.
Source Hossam Elbialy
Colourful background achieved with gradient fills.
Source Firkin
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Seamless Olive Green Web Background Image
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Gold Triangular Seamless Pattern No Background
Source GDJ
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin