MS Power-Point slide shows (PPS, PPT)

More and more slide shows available online were created using MS Power-Point proprietary format. The best open-format solution to publish slide shows is PDF format. This format doesn't handle animations nor transition effects, but it has interesting rendering capabilities:

• both fonts and graphics are handled as vectorial objects, which allows to strech/enlarge slides without quality loss.
• portability: pagination and formatting are identical on which ever platform you are viewing it.