French startup Bunkr is focused on one simple task: killing PowerPoint. To achieve this goal, the company’s well-designed web app will help you collect visual content and organize it into slides. The result is a very visual HTML5 presentation that works on your computer, phone or tablet. You can export your work in PDF or PPT as well.
Via Baiba Svenca
Looks like a very functional app that will enable rapid production of slide decks. Cost is $3 per month. I think I'd rather buy it than rent it.
Web-based presentation tool that you can develop on the fly (evernote style) and have multiple contributors - however there is a subscription fee after two presentations. HTML5 back end