the author of this app says:
Looking to enrich your BB functionality up to a PC on your hands? Do not want to pay a subscription fee? Then DynoPlex innovative product MasterDoc is what you need. MasterDoc will bring files of all the types that nowadays matter - DOC, XLS, PPT, PDF, JPG, GIF, MP3, and WAV - to your Blackberry in their perfect quality in the place you are. Viewing, sending as attachments, printing and faxing files are now mastered by Blackberry. Your desktop files are also accessible from Blackberry: browse and manage them using Google Desktop. All essential things that a busy professional might need while away from the office are here in one package. No hassle, no limits, no strings attached and absolute security - select the function and go.