I came up with what I call Passformula.

The idea is to create a one-time, well-defined formula to create a password from the name for the service/website domain you’re trying to log in. You would apply this formula each time you create an account on any website and later use the same formula to get the password at the time of the login.

No need to store passwords (for the majority of the cases) and works like a charm for me.

More details: http://www.rockoder.com/2020/04/26/passformula/