I have spent some time googling around to see if there are any (free) Flash/Flex/HTML5 based widget that can show the .ppt (powerpoint) but hiding the .ppt file URL or the ability to download it.

I found google docs viewer providing this feature but i am not sure how do I make it stop people from downloading it?

Can you please let me know how do i do this or suggest any widget that can take care of this?