Winspector Spy - Have you ever used Spy++ that comes with MSVC?
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Window Detective - Window Detective is a programmer's tool used to "spy" on an application's windows...
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
WinSpy - Retrieve window information.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.