iAlert is a free software that allows users to set up alarms through a transparent floating window when certain events happen.
The software also comes with a plugin called iAlertTerminalPlugin that offers several key features that make using this software even more enjoyable. For instance, web sites are updated, and your friends get connected on iChat; you receive new messages or even a new song starts playing in iTunes, and you will be notified. Moreover, iAlert provides users the ability to configure alarms and timers and control iTunes from alerts.
Overall, the iAlert software is an excellent tool for those who want to stay up-to-date with their Mac system events. Its customization options and support for essential features like alarms and iTunes control make it an integral part of any Mac user's toolkit.