We always like to think of PowerPoint as a glue that holds disparate media together. These media elements include sound, movies, pictures, clip art, and animation clips. Judiciously used, these elements can make your presentation look good, but they can also dramatically increase file sizes. Optimization software is the solution, and there are many such programs available. The newest of them all is PPTshare File Compressor. This program allows you to optimize presentations using different compression levels.
Read the Indezine review of PPTshare File Compressor.