Use webinar software to show a presentation (like Microsoft Powerpoint) to many viewers. When we last visited this question, we recommended the free option…

http://www.freebinar.com

But maybe you’ve found others?

At Team Expansion, we use

http://www.GoToWebinar.com

Maybe you’ve tried…

http://www.webex.com

This is a subjective decision. But please use a comment box (below the online version of this item) to share which is your favorite and why.