Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless pattern inspired by a drawing on Pixabay. To get the tile this is formed from, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
Prismatic Geometric Pattern Background
Source GDJ
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo