LyX is described as 'Document processor that encourages an approach to writing based on the structure of your documents (WYSIWYM) and not simply their appearance (WYSIWYG). LyX combines the power and flexibility of TeX/LaTeX with the ease of use of a GUI' and is a very popular LaTeX Editor in the office & productivity category. There are more than 25 alternatives to LyX for a variety of platforms, including Windows, Mac, Linux, Web-based and Self-Hosted apps. The best LyX alternative is Overleaf, which is both free and Open Source. Other great apps like LyX are Texmaker, TeX Live, Kile and TeXmacs.