VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.
GPGMail - GPGMail is an open source plugin for Apple Mail.
Advanced File Security Basic - Download Advanced File Security Basic. Protect files by encrypting them with a strong password, a series of questions, or even an USB key you can carry around with this powerful security solution
ElectronMail - Unofficial desktop app for ProtonMail and Tutanota end-to-end encrypted email providers