The "Show me password" is extension for Oracle SQL Developer or Oracle JDeveloper i.e. simple extension (tool) that decrypts all saved (encrypted) password for database connections, application server connection, servers etc. in SQL Developer or JDeveloper.
I've been trying to download the extension from http://show-me-password-sql-developer.googlecode.com/files/ShowMePasswordSQLDeveloper4_v1.0.0.zip, but the zip file seems to be empty.