PGF and TikZ

PGF/TikZ is a tandem of languages for producing vector graphics from a geometric/algebraic description. PGF is a lower-level language, while TikZ is a set of higher-level macros that use PGF. The top-level PGF and TikZ commands are invoked as TeX macros, but in contrast with PSTricks, the PGF/TikZ graphics themselves are described in a language that resembles MetaPost. Till Tantau is the designer of these languages, and he is also the main developer of the only known interpreter for PGF and TikZ, which is written in TeX. PGF is an acronym for Portable Graphics Format. TikZ was introduced in version 1.10 of PGF, and it is a recursive acronym for "TikZ ist kein Zeichenprogramm" ("TikZ is not a drawing program").The PGF/TikZ interpreter can be used from the popular LaTeX and ConTeXt macro packages, and also directly from the original TeX. Since TeX itself is not concerned with graphics, the interpreter supports multiple TeX output backends: dvips, dvipdfm/dvipdfmx/xdvipdfmx, TeX4ht, and pdftex's internal PDF output driver. Unlike PStricks, PGF can thus directly produce either PostScript or PDF output, but it cannot use some of the more advanced PostScript programming features that PStricks can use due to the "least common denominator" effect. PGF/TikZ comes with extensive documentation. The version 2.10 manual has 726 pages.