Cappuccino ! A Web Framework

Finally a Sunday, after a hectic week, a day to relax, I was just googling around till I came across this site, 280Slides. You can create presentations online, It had some nice features we would normally use to create presentations and was pretty easy understand and work on. I was amazed that such a powerful application running on a web browser !? I decided to do a research on how this application was built (since it was not Flash) and Cappuccino was my answer.