VSUsbLogon - Free software for Windows, Encryption Software for Windows, Video Downloaders, Login to Windows via USB device, Logon Screen Customization
Near Lock - A new way to lock your Mac. Just walk away.
Companion - Never walk home alone
USB Raptor - Lock and unlock your computer using USB flash drives as keys.
Rohos Logon Key - PC: Two-factor authentication solution that converts any USB drive or Bluetooth smart device into a...
KeyLock - KeyLock is a program to lock your computer with a USB Flash Drive.