PowerShrink 3.1 is a File Compression product from powershrink.com, get 4 Stars SoftSea Rating, PowerShrink enables you to reduce the size of Microsoft PowerPoint files (.ppt, .pps) by compressing them without noticeable quality loss. Most files we tested were reduced by 50% or more and according to the developer it can achieve results up to 90% depending on size and content of the presentation. The software offers different shrink modes based on the intended usage and you can also customize the compression by setting JPG quality, resolution and more. PowerShrink can process single or multiple files, offers optional command line options, shell integration (right-click menu) and can also be used directly from within PowerPoint. The software does not modify your original PowerPoint files. The license of this file & disk software is Shareware, the price is $39.95, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of PowerShrink, you can buy this file & disk software.