MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability.

Probe for hardware, check operability and find drivers

Tool to plot realtime and stored data from the commandline, using gnuplot.

Restart daemons after library updates.

IRC logging bot and web frontend

Perl module to create configuration editor with semantic validation

Poor mans Splunk. Command line real time statistics while tailing logs

Scripts to integrate with Slack messaging service.

Sun::Solaris::Kstat perl module for linux-zfs

uses Perl to extract, format, and display kstats from the ZFS ARC

Tools for people who attend key signing parties

Makefile and front-end to ease the deployment of configuration management files

check for processes need to be restarted in user sessions

A radically simple hierarchical External Node Classifier (ENC) for CFEngine

Script to record screencasts with ffmpeg