Prowl: Growl Client for iPhone
www.prowlapp.com
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
New $3 iPhone app by Zachary West:
Prowl is a Growl client for the iPhone. Notifications from your Mac can be sent to your iPhone over push, with a full range of customization and grace you expect.
Great idea. This opens up iPhone push notifications for anything you can think of.