Check Application Server (non check_sap method)?

I am searching for a nagios plugin that will run checks against a Microsoft Application Server, but I do not have a contract account through SAP in order to acquire their RFCSDK (required to use the check_sap plugin).

Does anyone know of a plugin that I may use to check the status of an application server, particularly one which does not require the SAP RFCSDK ?

Any assistance with this would be greatly appreciated.