KeePass Password Safe is a free software password management utility for Microsoft Windows, with unofficial ports for Linux, OS X, and a variety of other systems.
KeePass is a free open source password manager, which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key file. So you only have to remember one single master password or select the key file to unlock the whole database.
Source: http://keepass.info/