VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
1Password - 1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.
Lastpass - LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.
Dashlane - Dashlane is a secure way to bypass tedious logins, forms, and purchases online. Save all of your information and save time in your online transactions.