I have been searching for a long time for a tool that can aid in the pronunciation of words and I found one that is free. Your institution would need to have a flash server for most of these tools to work, but if you have (or can obtain) that then the these tools are free (for academic use) and can really help students with their pronunciation! This was initiated by (Arts ISIT) at the University of British Columbia.Here are a few of the tools:
Language Pronunciation Tool - This tool is designed to enhance a student's comprehension and pronunciation of a particular language
Handwriting Tool - This tool is excellent for languages which use symbols that students need to practice writing in Asian characters.
Go ahead and check out the other options they have available. You may find one that works for you. http://www.learningtools.arts.ubc.ca/index.htm