AppPolice - Mac OS X app for quickly limiting CPU usage of any running process
SysGauge - SysGuage is a responsive software utility that monitors the memory status, CPU usage, as well as network and disk activities of your system.
CS Fire Monitor - CS Fire Monitor is a user-friendly system monitoring application that keeps a keen eye on your computer’s behavior and aspects related to the hardware of your system.
Big Meter Pro - Big Meter Pro is a utility that monitors the disk and memory of your CPU.
Process Lasso - Process Lasso is NOT yet another task manager.
eesel - The new tab for work