Dato - Better menu bar clock with calendar and time zones
USB Raptor - Lock and unlock your computer using USB flash drives as keys.
Clocker - Keep track of people in different time zones
VSUsbLogon - Free software for Windows, Encryption Software for Windows, Video Downloaders, Login to Windows via USB device, Logon Screen Customization
Clock mini - Simple clock app in the Dock
Near Lock - A new way to lock your Mac. Just walk away.