M/Monit - Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Cacti - Cacti is a complete network graphing solution. It provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.