Sozi is a zooming presentation editor and player.
Unlike in most presentation applications, a Sozi document is not organised as a slideshow, but rather as a poster where the content of your presentation can be freely laid out. Playing such a presentation consists in a series of translations, zooms and rotations that allow to focus on the elements you want to show.
If you ever need your own local Prezi, this is an option. #presentation
@fkarlitschek Regarding your #oSC16 presentation: Did you have a look at Webmention for the like/comment part? Seems the protocols are there