Near Lock - A new way to lock your Mac. Just walk away.
UptimeRobot - Free Website Uptime Monitoring
USB Raptor - Lock and unlock your computer using USB flash drives as keys.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
VSUsbLogon - Free software for Windows, Encryption Software for Windows, Video Downloaders, Login to Windows via USB device, Logon Screen Customization
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring