Gryptonite
Cross-platform encrypted password and file database
...It stores passwords and whole files, so it can literally store any information you want to keep secret. Access your most-used passwords/URLs right out of a desktop tray icon.
For advanced users, it includes a separate utility called Grypto-Transforms, which has a universal hash calculator with all the major hash functions, generic encrypt/decrypt functions and a base64/hex converter.
It's not just easy to use, it's also highly secure. Security experts will be happy to know that it uses AES with CCM and has a solid security concept.