This software is licensed under the GPL, so feel free to alter it to your needs. The source, as a NetBeans project, is HERE. It would be nice to know what you've done with it if you do make any changes.
- Audible announcements at 1, 5 or 10 minute intervals
- Various colour schemes for easier visibility
- User choice of time zone
- Day and date display
- 12 hour and 24 clock displays and announcments