Projektor is a sophisticated Mac OS X application for intelligently presenting PDF slides. Continue to create your slides with LaTeX Beamer and present the resulting PDF file with Projektor. Of course, the PDF file may have been created with another program. As befits a presentation program, Projektor disables the sleep mode of your Mac while you are presenting.
External screens are automatically connected. The main and external displays are listed with their current resolution. When an external screen is detected, its position relative to the main screen is displayed.
For rehearsing purposes, Projektor displays the presentation view on your main screen when no external display is connected. This will help you practice your presentations with the same view you will have during your speech.
There is also a LaTeX style file that you can use to create a note file. The notes are displayed next to the slides.