This is so useful for developers with such poor Photoshop skills like me.

I love that you can just use a badge with a piece of XML instead of having to import the different resolution files manually.

Do they have onClicked/onPressed effects? That would be awesome. (If it is the case, I think you should highlight that fact, it's quite a killer feature IMO.)

Some helpful info on Material Design icons and how to use them to best effect: http://www.google.com/design/spec/style/icons.html

Too bad they aren't TTF. I've noticed only some Android phones can manage to render OTF. I've had trouble with meteocons being reliable specifically, which I see used here.

Bit of a pony request, but square icons as well as round ones would also be a nice thing to have. I'll probably be using a couple of these on my new phone, though - thanks!