What is Notified
Notified is a very simplistic tool to assist developers in seeing what notifications are being posted on an OS X system. This tool will expose the names of the notifications which you can add observers for in your apps. Notified shows notifications for its own Workspace as well as those from NSDistributedNotificationCenter.
How to get Notified
You can of course clone the code but there is also a binary available in the Downloads section