The 2.1.4 version of iStat Pro for Mac is available as a free download on our website. The software is included in System Tools. This free software for Mac OS X was originally designed by Bjango Pty Ltd.
From the developer:
iStat Pro is a configurable widget that lets you monitor every aspect of your Mac, including CPU, memory, disks, network, battery, temperatures, fans, load & uptime and processes. With this program, you are able to filter out specific disks, network interfaces, temperature, or fan sensors.
You may want to check out more software for Mac, such as RiffMaster Pro, Sequel Pro or WASEL Pro, which might be related to iStat Pro.