The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Embossed lines and squares with subtle highlights.
Source Alex Parker
Prismatic Abstract Line Art Pattern Background
Source GDJ
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
A repeating background with wood/straw like texture.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf