MathType is an interactive software tool that allows you to create mathematical notation for word processing, web pages, desktop publishing, presentations, and LaTeX, AMS-LaTeX, MathML, and LaTeX documents.
Furthermore, if you are a student or faculty member, your educational institution may already provide free or heavily discounted access to the latest versions of MathType and other software. Check your university's software portal before searching elsewhere. For example, Case Western Reserve University offers MathType 6.9 as a free download to its students, faculty, and staff. mathtype 6.0 free download