Evaluate PCTeX Version 5 free for 30 days.
When the program is installed, choose "Evaluate Word2TeX for 30 days" in the Unlock Software dialog.
When the program is installed, choose "Evaluate TeX2Word for 30 days" in the Unlock Software dialog.
Download MathType 5.2 for Windows
When the program is installed, choose "Evaluate MathType for 30 days" in the MathType Setup dialog.
Download TeXAide from Design Science, a free equation editor which can be used with PCTeX.