A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
CC0 for Free, hope you like it.
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Incoming catena. Stone & well. CC0 texture.
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Prismatic Geometric Pattern Background 2 No Black
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
From an image on opengameart.org shared by rubberduck.
*** Released Now !! ***2 Download
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Seamless Olive Green Web Background Image
Source V. Hartikainen
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
Colorful Stripes Background
This is a remix of "geometrical pattern 01".
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
*** Released Now !! ***Download
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Gamedev - Floors Textures. CC0 License.
Source Davit Masia
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
A red heart background texture.
Pattern repeating background 48x48
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Metal-Plain or Painted. CC0 License.
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Prismatic Groovy Concentric Background 3
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf