Element of beach pattern with background.
Source Rones
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
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 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
Prismatic Polyskelion Pattern No Background
Source GDJ
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
This one is amazing, truly original. Go use it!
Source Viahorizon
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
A version without colours blended together to give a different look.
Source Firkin
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
A seamless texture of a rough concrete surface.
Source V. Hartikainen
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ