Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
Seald - Keep your conversations secure, everywhere.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
Crypho - End-to-end-encrypted messaging and file sharing
TrueCrypt - TrueCrypt is a leading cross-platform that provides encryption tools that allow you to migrate any encrypted data to virtual disks images on your systems.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.