This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Prismatic Groovy Concentric Background 5
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Green Web Background, Seamless tile.
Source V. Hartikainen
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
To get the tile this is based on, 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
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Remixed from a JPG that was uploaded to Pixabay by susanlu4esm
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-brown.
Source Yamachem
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin