Statsignal - Statsignal is a simple and cost-effective way to monitor your website or server and publish a status page of your system.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
UptimeRobot - Free Website Uptime Monitoring
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
OnlineOrNot - Uptime monitoring for software teams (even teams of one).
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.