Recovery Manager for SharePoint Premier Edition
Migration Manager for Sharepoint
Server Administrator for SharePoint
Migration Suite for SharePoint
Migrator for SharePoint Online
>>If we go for Production Licensing and after some time we decommissioned old Servers, can we use same license on new upgraded hardware servers Farm?
Yes, as long as the old servers are fully decommissioned.
>>What about License if we buy for SP2010 and later we move to SP 2013, this will valid or expire in case of new version?