The Beamer Class
The beamer class is a LaTeX class that allows you to create a beamer presentation. It can also be used to create slides. It behaves similarly to other packages like Prosper, but has the advantage that it works together directly with pdflatex, but also with dvips.
The Latex Beamer Class Homepage provides with the steps to create a beamer presentation and some examples
Beamer Tutorial - MIT (pdf)
Powerdot is a presentation class for LaTeX that allows for the quick and easy development of professional presentations. It comes with many tools that enhance presentations and aid the presenter. Examples are automatic overlays, personal notes and a handout mode. To view a presentation, DVI, PS or PDF output can be used. A powerful template system is available to easily develop new styles.
CTAN provides additional details on Powerdot.
Note: These softwares are not a part of the default installation for LaTeX. The software downloads can be obtained from the respective homepages. For further assistance with the installation on your machine please contact computer support