Views

Earlier this year I built my first non-trivial Drupal site. It's pretty simple on the surface, but allows certain users to create nodes which represent a piece of work they've done for the organisation. using Views and Views Calc and a bit of custom code, these nodes are used to produce invoices for each of these users every month.

Earlier this year I was developing a Drupal module for a charity which teaches computing skills to people with disabilities (depending on when you're reading this article that link might even take you to the charity's shiny new Drupal site). Since the charity's work is distributed (they teach people in their own homes, on their own computers), they need an efficient system whereby reports can be filed by tutors for every lesson that they give.