Universal Password Manager (UPM) allows you to store usernames, passwords, URLs, etc. in an encrypted database protected by one master password. Its three strongest features are simplicity (it provides a small number of very strong features with no clutter), the ability to run cross-platform, and database sharing. Rather than having many separate databases (home, work, etc.), database sharing allows you store your database at a remote location (password protected HTTP URL, for example) and then have UPM automatically keep your local database in sync with the remote database.
SUMO Access Manager is a security system for PHP Web applications that can be added using only one line of code. Administrators can manage authentication and authorization for users, groups, and security policies with easy, all through an intuitive Web based interface. You can create users that can authenticate their password via LDAP, MySQL internal users, MySQL/PostgreSQL/Oracle generic users tables, and via Google Mail account.
Secluded Notes is a simple text editor that keeps each document as a part of its own executable. That part is called an "attachment", and the program encrypts/decrypts it on the fly with an AES 128-bit cipher. As long as you close the application, it automatically updates itself for the next run.
gpgpwd is a terminal-based password manager. It stores a list of passwords in a GnuPG-encrypted file, and allows you to easily retrieve, change, and add to that file as needed. It also generates random passwords which you can use, easily allowing you to have one "master password" (for your gpg key), with one unique and random password for each website or service you use, ensuring that your other accounts stay safe even if one password gets leaked. gpgpwd can also utilize git to allow you to easily synchronize your passwords between different machines.