Sarparse is a utility based off of cacti to graph Sar metrics from remote hosts. It require NRPE and SAR to run out-of-the box but could easily be modified for any other transport.
mod_layer7 is an application switching and load balancing module for Apache 2.2.x . This module utilizes mod_proxy, mod_deflate and mod_cache and contains embedded Perl interpreter that enables request rewriting and other interesting features.
This is a collection of three Perl scripts used to ease IOS switch migrations by tracking connected hosts before and after migration and recommending (or automatically applying) configuration changes based on where the hosts moved.