Heatmap is a PowerShell module to help you keep track of the performance of your machines. A heatmap shows the state of a counter at a glance. As the situation gets worse, the colors get hotter. Each item on the heatmap is based off of a performance counter.
You can find all of the performance counters that output a value from 1 to 100 by using the Get-PercentagePerformanceCounter command.