The CPAN shell (and module) automates or at least simplifies the building and installation of Perl modules and extensions. It includes some primitive searching capabilities and knows how to use Net::FTP, LWP, and certain external download clients to fetch distributions from the Internet. Then it automatically tests and installs them and their dependencies.
Config::Maker takes a file with data in simple hierarchical format (similar to BIND and DHCP configuration files) and several templates, and produces the text by filling in the values. It is mainly useful for creating related configuration files. It can be used to generate firewall configuration scripts, DNS zone files, DHCP configuration files, a reference from a single file with all users and machines, etc. It's useful when you are not satisfied with keeping information synchronized in several places, but don't want something as complex as cfengine. Snippets of Perl can be used if all else fails.
EMS is an event manager for PIKT and other monitoring tools that allows you to send UDP events instead of mail messages from PIKT alarms (not alerts). Those events are sent as XML ciphered (you can use your favorite cipher) messages via UDP, from the client (epush) to the manager (eventd), consolidate events together (grouping events together or discarding them when necessary), and store events in a backend database. The database is your choice, although EMS has been developed with MySQL in mind. Hooks are in place to provide future advanced event correlation, "management" of events via a web interface, display alerts on user uploaded maps, and send data from your performance monitoring application to RRDTool via special 'data' events.
PAR is a cross-platform packaging and deployment tool, dubbed as a cross between Java's JAR and Perl2EXE/PerlApp. It can turn your Perl programs into ready-to-run executables, build and use PAR files into @INC to avoid version conflicts, turn CPAN module distributions into PAR distributions, or install/uninstall/sign/verify PAR distributions.