Paper by FiftyThree is a lovely drawing and sketching app for the iPad. I like to dabble in it now and then, and my son loves it (when he remembers anything besides Minion Rush exists on an iPad).
For a good long while, Paper has had basic tools for free, and an expanded toolset for an in-app purchase. Now this free app has made its tools completely free, as well. I immediately wondered how they are making money, but then I remembered Studio Neat's little experiement.
Studio Neat took an app that wasn't seeing much for sales, made it free, and put an ad in it for their own smartphone tripod mount, the Glif. Let software sell hardware. It's what Apple itself does, right?
It just so happens that FiftyThree makes a stylus named the Pencil. And it was handcrafted for use with Paper. Maybe this is the way to let the software sell the hardware.
As I said, Paper is a wonderful app. If you like to doodle, sketch, or even make artistic masterpeices, and you have an iPad, then I highly recommend grabbing it.
And hey, maybe check out the Pencil, as well. I know I'm thinking about it a little more.