7. Presentations

Presentation is the practice of showing and explaining the content of a topic to an audience or learner.  Presentations come in nearly as many forms as there are life situations. In the business world, there are sales presentations, informational and motivational presentations, first encounters, interviews, briefings, status reports, image-building, and training sessions.

See more in Wikipedia

Presentation Skills

How to give an Effective Presentation

without any tech-tools ... the basics
from the Diane DiResta channel (on public speaking): Fear of Public Speaking One Minute Tips
Diane's series of One Minute Tips will help you move past your fear of speaking in public.

Open Office Impress

OpenOffice.org, commonly known as OOo or OpenOffice, is an open-source application suite whose main components are for word processing, spreadsheets, presentations, graphics, and databases.  See article in Wikipedia
"Impress" is the name given to its presentation programme, whose equivalent is Powerpoint in windows & Keynote in Mac (operating systems).  Impress, however, works on any operating system, and is free.

Powerpoint Tutorial #1

Secrets of professional presentations - a series of tutorials
PowerPoint 2007 tutorials - how to apply principles of graphic design and visual literacy to produce professional-level presentations with animations.

Powerpoint Tutorial #2

Powerpoint Tutorial #3

Powerpoint Tutorial #4

Powerpoint Tutorial #5

How to use Keynote (for Mac)

Tutorial video on how to use Keynote 08 which is part of Mac's iWork bundle.

& you can find more Keynote tutorials here

Should You Share Your Presentations Online & How

also an article about this here  with links to both services