dbader/alfred-countdown-timer — pull request #1 by jayzawrotny (2013-01-30 00:53:41+00:00)
Title: Replaced notification with PYNC

I couldn't get the notifications to fire. After doing some research I found http://objcolumnist.com/2012/07/25/os-x-mountain-lion-api-highlights/ which states: "It is important to note that only signed Apps (Gatekeeper, MAS etc) can post notifications."

However my solution is not the best fix. It uses pync https://github.com/SeTeM/pync which is a Python wrapper for terminal-notifier. If terminal-notifier is not present then nothing happens, else it works just fine.

Hope this helps. Thanks for writing this software!