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.
1ty.me - If you need to send a password or some other form of simple but sensitive information to someone...
Cryptgeon - Securely share self-destructing notes
Revealit.me - ReveaiIt.me allows you to send a one time link to a self-destructing document.
DSTRUX - Self-Destructing Files on iOS
Privnote - Send notes that will self-destruct after being read