Tox - Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
DSTRUX - Self-Destructing Files on iOS
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.
uTox - µTox is the lightweight client with minimal dependencies; it not only looks pretty, it runs...
Photo Face Swap - Photo Face Swap app lets you swap faces from your pictures with a single tap.