LockCrypt for Windows Mobile provides a secure, password protected database of your accounts. It uses an encrypted database, enabling you to access your account information, bank details, passwords or other information from a phone or PDA. Data is encrypted using industry standard AES encryption, which is regarded by the cryptography industry as very secure. Even if you phone is lost or stolen, your data will remain safe. There's also a desktop version.

.NET Compact Framework 3.5