Why not Beamer?
There is an excellent tool called Beamer, which is based on LaTeX and can be used with AUCTeX. The problem is, I don’t like TeX and LaTeX. This is, of course, a matter of personal preference.

Also, Scribble produces .html files. I find .html format more convenient for giving presentations than the Beamer’s format .pdf.

Most importantly: Beamer won’t give you blinking text.

It turns out, that Firefox disabled blink-effect, what a pity!