1)   NXPowerLite 2.5
NXPowerLite can reduce the size of your PowerPoint files by as much as 98%. It's fully customizable, allowing you to balance compression and quality. This free, fully functional trial version will compress up to 10 presentations.

 2)   PPTminimizer 4.0
PPTminimizer: compress PowerPoint & Word files - without zipping/unzipping them - by up to 98% of their initial size. Easier to share, store and send, PPTminimizer relieves e-mail accounts, servers & networks of unnecessary megabytes of Office files.

 3)   Kernel PowerPoint - Repair Powerpoint Files 4.02
Kernel PowerPoint is a Microsoft PowerPoint Presentation Repair software designed to recover corrupted Microsoft PowerPoint files. Kernel PowerPoint extracts text even from heavily damaged *.ppt files and never deletes from disk.

 4)   CyberLink StreamAuthor 4
CyberLink StreamAuthor 4 - Create Rich-Media e-Learning Content in 3 Easy Steps

 5)   icWord 4.1
icWord is a program for viewing word processor files saved in the Word formats doc and in AppleWorks cwk format for word processors. It allows you to view and convert these files, even if none of your programs are capable of doing so on their own.