If you are a Power Point user and you want more, Flashdemo.net is an interesting option.
Flashpoint is a powerful PowerPoint plug-in that converts PowerPoint to flash presentations, it is easy to use and provides accurate, small sized, file conversions. The converted flash file is smaller, secure, and in a streaming media format that’s ideal for posting presentations to websites, intranets or for creating self-running CD-ROMs. Flashpoint supports wav to mp3 conversion, this feature lets you reduce the file size dramatically, and the output flash file size can be as small as 5% of its original PowerPoint file. 
