Linuxo Planet

Impressive is a cross-platform tool to display presentations in a stylish way. The application supports PDF files or a folder containing images and besides beautiful slide transitions, Impressive features some useful presentation tools like: highlight boxes, which can be used to draw attention to a specific part of the slide, spotlight effect which is kind of like a highlight box but dynamic, and a screen overview which you can use to easily select a slide.

Impressive is highly customizable too, but unfortunately there's no GUI front-end (at least, that I know of). However, the default settings should be good enough for most people and to run it, all you have to do is open a terminal and type: "impressive /path/to/some_presentation.pdf" or "impressive /path/to/image/folder/" and the presentation should start.