9.26 - PlRPC is a simple package to use if you're looking to get working quickly and using Perl at both ends of the session. The POE environment supports RPC through POE::Component::IKC, but it may be overkill for many situations. SOAP::Lite is also a popular package that supports operating as a SOAP client and server. SOAP, the Standard Object Access Protocol is a common object-oriented RPC mechanism that is probably available to every other programming language you use. SOAP::Lite also provides support for XML-RPC, a similar but different RPC system. A comparison of SOAP and XML-RPC can be found at http://weblog.masukomi.org/writings/xml-rpc_vs_soap.htm. If you're looking to utilize Microsoft's DCOM services, operating as a client is supported by Win32::OLE, and making Perl objects available for DCOM is supported through ActiveState PerlCOM.

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I know there's some CORBA stuff on CPAN, but I've not used it, and don't know what state it's in.