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

OWASP ModSecurity Core Rule Set (CRS) Project (Official Repository)

[SUNSET] Initiate consistent EBS snapshots in Amazon EC2

A simple log analyzer which detects bruteforce attempts and prevents them by addin iptables rules.

Nagios/Icinga plugin for checking the health of your Puppet nodes via PuppetDB

Puppet module for mariadb