Rubber is a building system for LaTeX documents. It is based on a routine that runs just as many compilations as necessary. The module system provides a great flexibility that virtually allows support for any package with no user intervention, as well as pre- and post-processing of the document. The standard modules currently provide support for bibtex, dvips, dvipdfm, pdftex, makeindex. A good number of standard packages are supported, including graphics/graphicx (with automatic conversion between various formats and Metapost compilation).