The modules of Drupal commerce are broadly listed under categories:
This category basically supports multiple currency & localization for varied country base.
It consists of three Modules viz: Commerce Australia, Commerce Multi-Currency, Commerce European Union VAT
This category basically deals with Order & perform operations related to the same, designed as highly robust & highly flexible modules
The module consists five modules Commerce Order Confirm, Commerce Custom Order Status, Commerce Order Types, Commerce Re-Order, Commerce Billy