Battle Encoder Shirase - Software that controls per-process CPU usage: an “active” software CPU cooler.
SysGauge - SysGuage is a responsive software utility that monitors the memory status, CPU usage, as well as network and disk activities of your system.
Kiwi application monitor - Kiwi application monitor is a small program which lets you monitor your applications/processes, Windows and User activity.
Big Meter Pro - Big Meter Pro is a utility that monitors the disk and memory of your CPU.
Processes - https://www.oneperiodic.com/products/processes/
Process Lasso - Process Lasso is NOT yet another task manager.