This software can convert non-unicode encodings (various non-unicode fonts) to unicode 5.2 normative encoding (unicode compliant font). Supported non-unicode font are listed as follows:
  
   Supported Available Fonts that can be converted:
     1. Amyanmar
     2. Ava-Forever
     3. CE
     4. Myanmar1
     5. Myazedi
     6. Win-Family (Win Innwa, etc.)
     7. Zawgyi

   Conversion can be made in following available File Formats:
     1. Simple Text File
     2. Micorsoft Word 2003 File ( Multi-fonts conversion capablility)
     3. Microsoft Excel 2003 File ( Multi-fonts conversion capablility)
     4. XML file
 

This is the best converter we've seen. I coverted 900+ pages of .doc file... and it did the job so quick. 

It's free to download at:
http://www.myanmarnlp.org.mm/images/stories/download/unicode.converter.build.007.zip