MathType is a must-use software and really handy for engineering students mostly. A lot of times we have to write mathematical equations with lots of fractions, super and sub-scripts & mathematical symbols. This is where MathType is really useful. What makes it even better is it’s power of working with MS Word, Powerpoint and many other applications. You can also use it with excel spreadsheets, HTML and even wikipedia. When installed, Mathtype’s toolbar appears in all the supported programs and can be used to add equations to that program. It’s support for both Windows and Macintosh makes it more powerful. Full feature list can be seen here.
Mathtype comes in $97 while the academic version costs $57 but you can always google the free versions.