Another alternative to consider is using a tool that is not WYSIWYG (like Org-Mode). I think putting together a presentation that's good enough for most things-

Another alternative to consider is using a tool that is not WYSIWYG (like Org-Mode). I think putting together a presentation that's good enough for most things--e.g. a developer talk about some technology--with a tool like Org-Mode is easier and faster than using PowerPoint, Keynote or any other similar tools.