CRM 2011 or 2013 On Premise or Online
This is a simply utility to display the common mappings between entities in one interface.
An added benefit is that it displays the "hidden" mappings that are not available from the normal interface and require finding the GUID of the mapping and replacing it in the URL in order to access.
Opportunity Product to Quote Product
Opportunity Product to Order Product
Quote Product to Order Product
Order Product to Invoice Product
*No warranty expressed or implied - use at your own risk!