Check out a system monitoring module for Mac. Manage the parameters for analyzing, tracking, and displaying system data as a set of statistics for different aspects of system functionality. Additionally, control network usage and receive notifications.
Monity 1.4.5 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This software for Mac OS X was originally created by Lukasz Kulis. The software lies within System Tools, more precisely System Optimization. We recommend checking the downloaded files with any free antivirus.
From the developer:
System, Memory, Network, Disk usage and Battery status at a glance.
... an advanced System Monitoring Widget for OS X. Monity takes it's place in OS X new Today View and oversees your components statistics just for you. Having an eye on your systems and network usage without messing around like before with huge and uncomfortable symbols in the menu bar was never so easy.
You may want to check out more software for Mac, such as FontNuke, CPU Speed Accelerator or FastScripts, which might be similar to Monity.