Program Protector
With Program Protector you can password protect any Windows application.

@SwIt Printfil
Lets DOS-Windows-Unix-Linux apps. printing to Windows printers, PDF/e-mail, fax.

WindowsGuard
Password Protect Windows Programs and Encrypt Files, Folders, Drives for Free.

Registry Mechanic
Advanced registry cleaner for Windows that can safely clean and repair problems

X-NetStat
Monitor your network and Internet connections and the programs behind them.