| Category | Represents a Category |
| CategoryCompareId | Comparator used for comparing Categories by id |
| CategoryCompareName | Comparator used for sorting Categories by name |
| FilterItem | |
| GuiState | Class encapsulating state of an object in the data model |
| Item | Represents an Item |
| ItemCompareId | Comparator used for comparing Items by id |
| ItemCompareName | Comparator used for sorting Items by name |
| ItemFunctor | Functor for processing items |
| KitList | Main application class |
| KitListDao | Defines the methods that an implementation of this class must implement |
| KitListGui | Encapsulates the methods for the application's GUI front end |
| KitModel | Holds a rich graph of objects representing the application's data model |
| KitParser | SaxParser implementation for reading the KitModel from an XML document |
| KitPrintOperation | Prints the kitlist |
| ModelCategory | Represents a Category combined with GuiState attributes |
| ModelCategoryColumns | A definition for displaying a ModelCategory in a combo box |
| ModelItem | Represents an Item combined with GuiState attributes |
| ModelItemColumns | A definition for displaying an item in a multi-column list |
| ModelItemCompareId | Comparator for comparing items by their unique ID |
| Service | Business/service layer implementation |
| TickItem | |
| XmlDao | Implementation of a KitListDao using XML as the persistence store |