KeyJNote is a PDF presentation displaying application. It is a python script that uses pdf and ghostscript for PDF rendering. It is very stylish and includes many cool page transitions, an overview feature and the ability to highlight and spotlight parts of the slide during the presentation. The above image shows the overview feature.
Installation. On Ubuntu, use apt-get:
Otherwise download the software from the project site.
apt-get install keyjnote
Use. Just launch the program from the command line with the name of a pdf file; it will use random transitions. You can specify which transitions to use through an auxiliary file.
More information. There is an online manual, and a demo presentation that highlights KeyJNote's features. It is best viewed with KeyJNote.