At first glance, CheckUp by App4Mac is a system monitor. Use it to keep track of your processor(s), RAM, disks, network activity and processes. But that's just the beginning.
The UI is very nice. Each set of functions gets its own window. For instance, the "Profile" pane displays information like your machine's serial number, OS, processor(s), IP address, MAC address and more.
The "System" pane lists all installed applications and their version numbers, plus all operating systems that your machine will support, including Windows and Linux. A drop-down menu lets you switch between installed applications, fonts, drivers, Internet plugins, preference panes and login items.
The re-sizable window moves from pane to pane with a snazzy 3-D transition (either cube or swap) and is very easy to read. I especially like the "Processors" pane which lets you pop out the meters measuring processor activity.
Here's the cool part of CheckUp. You can use it to monitor a remote computer, either on your LAN or across the internet. This is very handy for IT pros who could use a quick-and-dirty glance at a far-away machine.
The purchase fee of $29US includes lifetime updates. If you're looking for a stylish system monitor that's actually fun to use, give CheckUp a try.