Free Hide Folder - Free Hide Folder is a free computer security software to hide your private folders.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
File in File - Hide File in another File! e.g. hide mp3 in picture etc.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.