GNU gnu-pw-mgr is a password manager designed to make it easy to reconstruct
difficult passwords when they are needed, while limiting the risk of attack.
The user of this program inputs a very long initial password "seed" and a
self-defined transformation of a web site URL to obtain both the password and
a user name hint for that web site. The seed is stored in a hidden file.
However, the passwords and the URL transforms are never stored anywhere. You
must remember this transform (password id), or the password is lost forever.