Usually, when you try to compile some TeX files, which include images and references, you need to use huge Makefiles to generate the PS, DVI, PDF, etc.
Rubber is a wrapper for LaTeX, and allow you to change the huge Makefiles for a simple command line.
For example, if you want to generate a PDF of a publication, which includes bibfiles, eps images, etc, the command is:
rubber -d your_file.tex
If you want more information,
the website of the project is https://launchpad.net/rubber