Class::Tiny offers a minimalist class construction kit in around 120 lines of code. It uses no non-core modules for any recent Perl, while providing more features than Object::Tiny or Object::Tiny::RW.

Contains configuration tweaks and files that increase metrics gathering frequency, several extended pmlogger configurations, and automated pmie diagnosis, alerting and self-healing for the localhost.

The PCP Python3 module contains the language bindings for building Performance Metric API client tools using Python3.

Class::Virtual is a base class for implementing virtual base classes (what some people call an abstract class). Kinda kooky. It allows you to explicitly declare what methods are virtual and that must be implemented by subclasses. This might seem silly, since your program will halt and catch fire when an unimplemented virtual method is hit anyway, but there's some benefits.

A static analysis tool to detect side effects in PHP code.

Performance Co-Pilot (PCP) front-end tools for exporting metric values to InfluxDB (https://influxdata.com/time-series-platform/influxdb).