[MarcusBrutus]

What's the equivalent for emacs?

[TallGuyShort]

I've seen plenty of these submitted before. A couple of others for Vim, too. I suspect they're more common for Emacs, though: http://www.emacswiki.org/emacs/EmacsPresentation

[Grue3]

AuCTeX+LaTeX+Beamer

[deng]

Yes, and then use doc-present:

https://github.com/dengste/doc-present