Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
andOTP - andOTP is a two-factor authentication App for Android 4.4+
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.