Prismatic Groovy Concentric Background
Source GDJ
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Prismatic Groovy Concentric Background 4
Source GDJ
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
A seamless marble-like texture colored in light blue.
Source V. Hartikainen
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen