Inductel Inc.: Brody's Medical Dictionary of medical terminology with illustrations and spell check, on CDROM.
MediSpell: Utility for spelling medical terms with Microsoft and Corel word processors, with free trial version.
Multilingual Medical Spreadsheet Dictionary: Spreadsheet of medical and technical words in English with equivalents in Spanish, Portuguese, French and Dutch.
Spellex: Offers spell checking software for numerous medical fields.
XTerm: A searchable database that allows wildcards and logical operators, offered as freeware.