Reacting Live - Make your presentation more fascinating and outstanding.
eWebinar - Turn any video into an interactive, automated webinar
Zeetings - Turn your presentations into interactive conversations
Poll Everywhere - Audience response system that uses mobile phones, twitter, and the web. Responses are displayed in real-time on gorgeous charts in PowerPoint, Keynote, or web browser.
SlideLizard - Powerpoint plug-in for live audience interaction
TwentyThree Webinars - A webinar tool you can finally love