Stripe Push Notifications
What's the best kind of Push Notification? One that tells you you've made more money of course.
Stripe Push is a little side-project that sends you Apple Push Notifications whenever you get a new charge or transfer via Stripe.
You can configure what type of notifications you want to receive and their frequency. I've open sourced the Sinatra and Mac app behind it on GitHub.
Get it from the Mac App Store.