TeXworks is a free, open source, multi-platform software application for creating and editing documents based on the TeX typesetting system. It is designed to be easy to use with a minimalistic user interface that provides access to the most common features needed to create and typeset documents. It features an integrated PDF viewer, support for multiple languages, and support for various file formats and styles. It also provides a range of features for document preparation, including spell-checking, table of contents generation, and support for LaTeX and TeX commands. TeXworks is suitable for both beginner and experienced LaTeX users, and is available for Windows, Mac OS X and Linux.
TeXworks is a TeXs IDE, but LyX is a word processor that uses TeXs as a typesetting engine.