TeXworks is an open-source application software, available for
Windows,
Linux and
OS X. It is a
Qt-based
graphical user interface to the typesetting system
TeX and its extensions
LaTeX,
ConTeXt, and
XeTeX. TeXworks is targeted at the direct generation of
PDF output. It has a built-in PDF viewer using the
poppler library; the viewer has auto-refresh capability and also features SyncTeX support (which allows the user to synchronize the PDF viewer position with the source and vice versa with a single click).