Beamer is an excellent PDF presentation tool for LaTeX. Its biref features are

• Can use both dvips/ps2pdf and pdflatex (dvipdfm is not supported)
• Provides lots of overlays and transitions for fancy presentation (You do not need to use TeXPower nor P4)
• Provides navigation bars and symbols
• Provides various templates
• Provides easy multimedia handling
• Provides zooming figures
• Provides emulation for FoilTeX, (HA)Prosper, Seminar, and TeXPower classes

2. Example Files

• beamer_guide.pdf for illustrating how to use various features of Beamer. This PDF is based on Beamer version 2.20 and compiled via pdflatex. 
• beamer_pstricks.pdf for illustrating how to use PSTricks with Beamer (dvips/ps2pdf route) (as of 8/27/04).