Constructing a Windows-Less Office
I will suggest not applicatation (you will choose whatever you like), but format:
I used to make presentation in PowerPoint, but after switching i have found the format nearly perfect. There might be some issues for printed versions, but hothing which can not be rather easily solved.
And guess what: you can present your work on any computer and any platform - no need to ask: do you have PowerPoint / WhateverPresenter installed? You can put the work on your server etc.