I am fond of UML diagrams for the programming part and UML or ER for the database schema. There are a lot of great tools that can reverse engineer code -> UML

I am fond of UML diagrams for the programming part and UML or ER for the database schema. There are a lot of great tools that can reverse engineer code -> UML and databases to ER or UML. (and forward engineer UML or ER -> code or database) I find them quite helpful. If someone has taken care to keep up UML diagrams, and I can grab the blessed ones with more context that is great.