Catch - Catch is the easiest way to use ShowRSS on OS X. It'll take care of everything.
SunCalc - Find out where the sun will be at any time in any location
What Got Done - The simple, lightweight alternative to team status meetings.
Alpenglow - Never miss a incredible looking sunrise or sunset again
Flowist - A lightweight tool to boost your team's shared awareness
Solaris Sky Calendar - An astronomy calendar right in your pocket