Geometric triangles seem to be quite hot these days.
Source Pixeden
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Colourful background achieved with gradient fills.
Source Firkin
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
From an image on opengameart.org shared by rubberduck.
Source Firkin
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Prismatic Groovy Concentric Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo