There are more tools than the ones for editing the code, and for generating the documentation. We can also generate (... drum roll ...) UML diagrams! Of course, we could use our favorite diagram drawing program (e.g. *Dia*) and write an UML diagram, but we are *lazy*, so we use automatic ways of dealing with the problem. Enter *Autodia*. Is a tool that can analyze your code and generate a good (although a little messy at first) UML diagram of your classes. It understand Java, Perl, PHP, SQL, and others (soon Python too). It is written in Perl, but we will not hold that against it %;-)%, because the code is quite readable and well organized. You can also go the other way, if you have a nice UML diagram, you can generate PHP (or Java, or Perl, etc.) with dia2code. *Umbrello* is a specialized tool (unlike Dia), and supports the "standard" XMI format, and the companion project *xmi2code* can produce code from your UML description.