Contractors application are mainly used by contractors who can request for managers to approve leave and salary_request.
Registration link for Developer Resource-
https://developer.agileappslive.com/networking/WebFormV2.jsp?sid=6ae0dc45219f435f8c93dc4be70105f8&cid=897688365&oid=397dc76623de4be6a30d4e58a41c51df