Exces

Exces. Simple, pretty, secure. Exces allows you to protect your precious files with the click of a button.

Just pick a password, lock, and you're good to go. Exces uses the strong, uncracked AES encryption standard.
Exces is a tool that lets the users create password-protected vaults. The ease of use and the attractive interface are Exces' key features. Each vault is protected using the same encryption algorithm Apple uses for FileVault - AES 128. Exces features a password assistant, to help choose strong passwords. Exces now also has a shrink vault feature, which lets you easily shrink a vault to the minimum possible disk space.