LyX is a document processor designed for those who want professional output with a minimum of effort and without having to become specialists in typesetting. The job of typesetting is done mostly by the computer, not you. LyX combines the comfortable interface of a word processor with the high quality of a real typesetting system. LyX uses LaTeX, a typesetting system for a wide range of documents.
What's new in this version:
Version 2.1.2 detects some additional postscript and pdf viewers when they are on the system PATH (AcroRd32, SumatraPDF, gsview and qpdfview).