I was looking the other day for a good password storage/management solution. — preferably a free, open source application.
KeePass meets my needs at the right cost. It uses TwoFish and AES to encrypt the password database and keeps the passwords encrypted in memory as well. It also allows for the use of key disks by themselves or in combination with a master password. Suffice to say, you can customize the level of encryption and security to match your particular level of paranoia.