TotalPasswords offers a single and secure storage for all of your passwords (in fact other “secrets” as pin codes, access codes can be stored here too) while you have to memorize only one master password.
You should use a fairly complex but easy to remember master password because it is used to encrypt all stored secrets so if you forget it all your data will be lost. The application has database backup - restore too, and can be synchronized with passwords kept in Brain2CPU’s TotalReminder (v 8.0 or later).
TotalPasswords is completely free and contains no form of advertising.