Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
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...
Xpire - Shrink your digital footprint with self-destructing tweets
Revealit.me - ReveaiIt.me allows you to send a one time link to a self-destructing document.
BNBSMS - Send anonymous SMS messages with blockchain & BNB token