What tools do you use to give presentations? I was wondering what tools that people in this field (theoretical computer science) use to create presentations. Since a great deal of computer science is not just writing papers but also giving presentations I thought that this would be an important soft question. This is inspired by the previous question what tools do you use to write papers.  The most common that I have seen are as follows.


Beamer 
Microsoft PowerPoint
LaTeX
GraphViz


I was wondering if there are any other tricks that I am missing?
For drawing diagrams, there's tikz in latex, and, if you have a Mac and a bit of cash, Omnigraffle. Both produce high quality diagrams.