One-Time Secret - One-Time Secret is a way to share sensitive information simple and secure.
Adamant Messenger - The most secure and anonymous messenger, encrypted with Blockchain
Password Pusher - Go Ahead. Email Another Password.
Sonar - 2-way chat with your customers over SMS and FB Messenger
Password.link - Securely send and receive secrets using a one-time link. The secret is encrypted and decrypted in the browser using an encryption key only known by the user. Has features like notifications, teams, API. Trusted by IT teams all around the world.
ttirik - Unsure about giving out your phone number, but still need to make a call?ttirik is a free service that allows you to make calls with just a URL link.