Slides
Slides is a LGPL slides generator, unique in that you write a Python program in order to create your presentation. That is, you write a program that when run generates the slides for your presentation, currently in HTML. Since this is a Python program, the output can be customized merely by extending the classes in Python.
You can see an example slide-generating program and the slides it outputs.
Downloads
Slides-1.0.1.tar.gz - requires Python 2.1.
Slides-1.0.tar.gz - requires Python 2.1.
Slides is available in Debian testing and unstable, thanks to Moshe Zadka.