CPU LED is for you if you ever wonder how stressed your CPU is? Sometimes, opening a complex activity monitor while your computer is heavily loaded is too late (or too much). Sometimes all you need to know is that your CPU is working hard.
CPU LED is a very lightweight unobtrusive app that adds a LED in your status bar indicating your CPU activity (coded as light, medium or hard). You can have only one light for all your processors or one per core (your choice). You can also choose the status icon appearance so it blends nicely with your status bar style.
In order to know what is going on with your computer at a glance, CPU LED is the perfect companion for Disk LED!
Note: While the software is classified as free, it offers in-App Purchases.