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.
Morpheus is a Perl module that implements a configuration engine that completely separates config consumers from config providers. Consumers can obtain configuration values by using this module or the morph script. Configuration values are bound to various nodes in the global configuration tree, similar to a virtual file system. Consumers can ask for any node or for any subtree. Providers are plugins which can populate the configuration tree from any sources, such as local configuration files, configuration database, and the environment. The overall program configuration is merged together from all data provided by plugins.
C-DynaLib is a Perl module that allows Perl programs to call C functions in dynamic libraries. It is useful for testing library functions, writing simple programs without the bother of XS, and generating C function pointers that call Perl code. If you have a C compiler that Perl supports, you will get better results by writing XSubs than by using this module.
EWS-Client is a module that acts as a client to the Microsoft Exchange Web Services API. From it you can access calendar and contact entries in a nicely abstracted fashion. Query results are generally available in an iterator and convenience methods exist to access the properties of each entry.
Math-Random-Xorshift is a Perl module that contains a straightforward implementation of the Xorshift PRNG algorithm proposed by G. Marsaglia in 2003. The algorithm is extremely fast and passes the Diehard test, though it is not reliable enough statistically. This module is useful for games and similar applications.