Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.
Source V. Hartikainen
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A free background pattern with abstract green tiles.
Source V. Hartikainen
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ