LyX is an open source document processor based on top of the LaTeX typesetting system. Developed by Matthias Ettrich
License: Open Source
LyX is ideal for users seeking a more visual document creation experience with WYSIWYG editing, while TeXnicCenter caters to advanced users who are comfortable with LaTeX syntax and require extensive customization and control over their documents. Both tools support LaTeX but differ significantly in their user experience and target audience.