Other Tools: GarageBand
The main difference between Audacity and GarageBand is that GarageBand is intended more for arranging than recording or editing, though it can be used for all three. Audacity is specifically an audio editing platform. If you are interested in learning more about GarageBand, the following video provides a nice overview of how to use the platform to record and edit podcasts:
A written version of the video tutorial is also available on the BussSprout website.