Sparc Performance Monitoring Software That Can Monitor Linux As Well?

I administer V880 and V890 Sun server running both Solaris 8 and 9. I currently use Orca and Nagios to monitor these systems. We are going to re-platform using a Dell server solution with Redhat Enterprise however there will be a long period of time where Solaris and Redhat will coexist. Does anyone know of a Sparc program that I can run to effectively monitor Linux while we transition?