Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Seamless Olive Green Web Background Image
Source V. Hartikainen
From an image on opengameart.org shared by rubberduck.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
A free pink background pattern.
Source V. Hartikainen
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
It looks very nice I think.
Source V. Hartikainen
The name is totally random, but hey, it sounds good.
Source Atle Mo
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Prismatic Abstract Geometric Background 5
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward