Wolfram Research is providing early access to a number of conversion utilities on MathSource. Please understand that most of these tools, while perfectly usable, are still under development and are provided as is. Wolfram Research cannot accept any responsibility for them or provide the usual technical support. All packages come with the email address of the primary developer. Please contact the developer if you have any questions or suggestions. Also available in Japanese http://library.wolfram.com/howtos/compfiles/index.ja.html