This module provides a function to validate postal codes and ZIP codes for various countries. It has no user interface of its own, but can be used by other modules.
This module provides a field type, that lets one pull a property of the entity (like update date) and place it as a field. There is no widget for setting this but there are formatters.
Money CCK Field defines a compound field that uses the Currency API, which is included in the Currency module, to get a list of existing currencies and their symbols.