Carbon Copy Cloner 3

The well-known application from Mike Bombich, Carbon Copy Cloner, is now available in version 3:

CCC 3.0 features a new interface designed to make the cloning and backup procedure more intuitive and more responsive. Users have better control over what gets backed up, and are provided with detailed information about the progress of their backup. In addition to general backup, CCC can also clone one hard drive to another, copying every single block or file to create an exact replica of your source hard drive. CCC's block-level copy offers the absolute best fidelity in the industry!
Among the new features are:
- Support for block-level disk-to-disk clones.
- Synchronization built-in, not bolted on.
- Support for backing up across the network to another Macintosh.
- Advanced scheduling capabilities -- Backup tasks can now be scheduled on an hourly, daily, weekly, or monthly basis, or you can indicate that a backup task should run when the backup device is attached (e.g. an iPod).
- CCC recognizes iPods specifically, allowing time for the iPod:iTunes synchronization to complete.
- The ability to drill down into folders to select exactly what gets copied and what doesn't (you can drill down indefinitely).
- Built-in software update feature notifies you when updates are available.

As usual with donatioware, you can use this application for free, but do not hesitate to donate to support its development
Additional information here.