Prometheus - An open-source systems monitoring and alerting toolkit.
Symantec Data Loss Prevention - Fully protect your data with the comprehensive detection technologies and unified policies of Symantec's industry leading Data Loss Prevention (DLP).
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
StatsD - Simple daemon for easy stats aggregation.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.