I have been checking out several open source packages for presentation. I have been using Star Office so far, and am mostly happy with it (although it's kind of slow): it's got everything but the kitchen sink, and I can develop presentations in my Linux box and show them in a WinXX laptop. However, I'm about to give a presentation in a HispaLinux conference, and have prepared a RH 8.0 laptop. I can still use OpenOffice, which comes with it, but I would like to try something new. So far, I have tested:
PerlPoint: does not seem to be very powerful. Generates HTML. Similar in syntax to POD.
AxPoint: generates PDF, used PDF transitions, portable (can be seen with Acrobat reader, xpdf is discouraged), but not very powerful: placing graphics seems hard to do, no support for slide templates... for a small, straighforward presentation, that might be it.
MagicPoint: a bit more powerful, peculiar syntax, can embed graphics and stuff, uses its own presentation program, and can generate HTML or (I think) PDF.