Other LaTeX-to-MathML conversion programs

• Tralics: a LaTeX to XML translator
  
  This hard-to-find program was brought to my attention only recently, but has been available for several years. From the report I received, it is a very good (and complete) LeTeX to XML translation program.
• W3C MathML implementations page
  The list the W3C maintains for 'MathML Software - Converters'.

LaTeX resources

• AMS-LaTeX
• Short Math Guide for Latex, version 1.09 (written by Michael Downes) (pdf)
• AMS User's Guide for the amsmath Package (Version 2.0) (pdf)

MathML resources

• Mathematical Markup Language (MathML) W3C Recommendation
• W3C Characters, Entities and Fonts
• Authoring MathML for Mozilla

Other

• Download (or update) the Java Runtime Environment for your operating platform.
• Download Firefox.
• Get the latest Firefox MathML Fonts.