Disk Watchman

Disk Watchman is an application to monitor the space levels on your hard drive in real time and in full detail. From its small window, you can keep an eye on all kinds of information concerning your hard drive.

You can set alerts and notifications via email, ICQ, SMS, or just sounds to let you know when your hard disk occupancy exceeds a certain limit.

Disk Watchman also includes powerful tools for managing your occupied space (backups, temporary and duplicate files, etc.).

In short, this is a great way to keep your hard drive clean. Especially useful if you have space problems.