MathType is a powerful interactive equation editor for Windows and Mac that lets you create mathematical notation for word processing, web pages, desktop publishing, presentations, elearning, and for TeX, LaTeX, and MathML documents.
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Software Titles Tagged "Mathematical Notation"
Wolfram Mathematica is a software system with built-in functions for several areas of technical computing that allow machine learning, statistics, symbolic computation, manipulating matrices, plotting functions and various types of data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other programming languages.
MacTeX is a free redistribution of TeX Live, a typesetting environment based on TeX. While TeX Live is designed to be cross-platform (running on Unix, macOS, and Windows), MacTeX includes Mac-specific utilities and front-ends (such as TeXShop and BibDesk). It is also pre-configured to work out-of-the-box with macOS, as it provides sensible defaults for configuration options that, in TeX Live, are left up to the user to allow for its cross-platform compatibility.
LyX is an open source, graphical user interface document processor based on the LaTeX typesetting system. Unlike most word processors, which follow the WYSIWYG ("what you see is what you get") paradigm, LyX has a WYSIWYM ("what you see is what you mean") approach, where what shows up on the screen roughly depicts the semantic structure of the page and is only an approximation of the document produced by TeX.