The Ft doorbell is an AKPERSONs metaphorical front door, which may be public or private, here the principal developers.
The scaled desktop version here is fully operational, red and green flaps collapse and expand the movable doorbell legendbar.
Doorbell white (offline) if not logged in,
easy peasy social login (main icon)
currently from Twitter, Google,
and (later) Amazon, Apple, and Linode.