I’ve only spent a short amount of time with it so far but Deckset is impressing the hell out of me for creating Keynote-like presentations with Markdown syntax. I love creating minimalistic slides and I always feel like going from notes to slides loses something. Now I can create my notes with the slides being in-line with the content using a minimalistic design language in Markdown. <3
It’s only available for Mac through the Apple Mac App Store at the moment.
Check it out: http://www.decksetapp.com