Add speaker notes to your slides to make them talk. SlideSpeech converts your words into a voice over using text-to-speech. SlideSpeech then sends you a link to the talking version of your presentation in an e-mail message, ready for you to forward on to your audience. See this example: http://bit.ly/cws22
Extension adds SlideSpeech Convert to your Google Presentation menu. This menu choice gives you a shortcut for sending your presentation to firstname.lastname@example.org with the command File > Email as Attachment > Attach as Powerpoint (.pptx).
Once you have your converted presentation, edit and add voice gestures to it on the SlideSpeech website: slidespeech.com