PDF and PostScript graphics in TeX.
pgf -- A Portable Graphic Format for TeX PGF is a macro package for creating graphics. It is platform- and format-independent and works together with the most important TeX backend drivers, including pdftex and dvips. It comes with a user-friedly syntax layer called TikZ. Its usage is similar to pstricks and the standard picture environment. PGF works with plain (pdf-)TeX, (pdf-)LaTeX, and ConTeXt. Unlike pstricks, it can produce either PostScript or PDF output. The material in base/ is by the author of the pgf package. The material in contrib/ is by various authors, not necessarily associated with the authors of the base material.