OnionShare2.3 adds anonymous chat!
Imagine you want to send some critic information. Imagine this person has his/her public gpg key on her website and social accounts (so you can "trust" it).
You send her an gpg encrypted mail. Maybe even from a disposable mail address.
But instead of putting the "content" on the email, what you send is the link to a Tor-onion-services encrypted, anonymous chat that doesn’t store any messages anywhere.
And you can send files!
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.