Click on the following links. Please note these will open in a new window.

http://www.presentationmagazine.com/ 
Presentations Magazine
Another good commercial site.  Good articles on videoconferencing, reviews of technology, and up-to-date presentation practices.

http://www.onlinepresentations.com/
Online Presentations
This commercial site offers advice from presentation consultants, plenty of tips and techniques, and various resources.

http://www.bartleby.com/
Bartleby Project
Columbia University's site provides a link to Bartlett's Quotations, a great source for attention-getting quotes.  Students just type in a keyword or phrase.  This site also provides a way to authenticate a quote.

http://www.lhup.edu/~dsimanek/neverwrk.htm
It'll Never Work!
This site is another source of attention-getters for presentation introductions.  It contains humorous quotes from influential people who made quirky predictions.  For example, Thomas Edison once said nobody would ever try to steal his idea for the phonograph because "it has no commercial value."

http://www.crystalgraphics.com/
Crystal Graphics
This site provides backgrounds, transitions, titles, photo effects, charts, arrows, and more as "plug-ins" for PowerPoint.  Use with caution.

http://www.leadingauthorities.com
Leading Authorities
This site has information on great speakers.  It offers resources to listen to great speeches, a speaker search, and news on speakers.  You can hire guest speakers here for company events and meetings.

http://www.toastmasters.org
Toastmasters International

http://www.nsaspeaker.org/
National Speakers Association