SafeNote - Encrypt and send files and notes with a link that automatically destruct after being read. SafeNote is a free web-based service that allows you to share a note or a file with confidentiality. There is no way to spying on you even to a hacker.
Wickr - Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender...
1ty.me - If you need to send a password or some other form of simple but sensitive information to someone...
Burn Note - Burn Note is the name of a continuous private messaging utilizing which you can have an ongoing private discussion with your companions or any individual who is at Burn Note.
Revealit.me - ReveaiIt.me allows you to send a one time link to a self-destructing document.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.