pdfTeX is an extension of TeX which can produce PDF directly from TeX source, as well as original DVI files. pdfTeX incorporates the e-TeX extensions. pdfTeX also has a variety of other extensions, perhaps most notably for microtypography line breaking features. The microtype package provides a convenient interface for LaTeX. pdfTeX is released as part of TeX Live, and also included in all TeX distributions, notably MiKTeX. Current release: NEWS, manual, sources.