Test::Class provides a simple way of creating classes and objects to test your Perl code in an xUnit style. Built using Test::Builder, it was designed to work with other Test::Builder-based modules. You can easily package your tests as classes/modules rather than *.t scripts. This simplifies reuse, documentation, and distribution, encourages refactoring, and allows tests to be extended by inheritance.
Cloonix is a Linux router and host simulation platform. It fully encapsulates application, host, and network l2 and l3 into a relatively easy-to-use simulation GUI. Network delay and loss characteristics can be configured per link. It provides support for running kvm or UML virtual machines configured into an arbitrary complex network configuration. It is possible to run a 12 router UML simulation on a small x86 host (a P4 with 512 MB RAM). 32- and 64-bit KVM machines are provided.