GeekTool

If you're looking for a software that can help you monitor the performance of your Mac, GeekTool is an excellent choice. It's a PrefPane, which means it's a module that's integrated into your System Preferences. This toolbar is available for both Panther and Jaguar versions, and it has the ability to display system logs, Unix commands output, or images from the Internet directly on your desktop.

One of the standout features of GeekTool is File mode. If you want to keep track of the activity taking place on your Mac, this mode can really come in handy. It lets you monitor MacOS X activity with /var/tmp/console.log or /var/log/system.log. With File mode, you can easily keep an eye on any changes and updates, without constantly having to switch between different programs.

For more advanced users, Shell mode is a great option. This mode lets you launch custom scripts or commands like "df," which checks the space left on your filesystems or "uptime" to monitor the load of your machine. In other words, Shell mode lets you create your own customized monitoring system for maximum efficiency and productivity.

Lastly, there's Image mode. This mode is especially useful for server administrators who want to monitor bandwidth usage, CPU loads, and memory availability. By integrating tools like MRTG or RRD, you can easily program GeekTool to display this data right on your desktop.

Overall, GeekTool is a powerful and flexible software that offers a unique way to keep track of important system information. If you're looking for a way to improve your productivity and efficiency, give it a try!