Peek-a-Boo is a Mac OS X utility to monitor and manipulate all running processes. You can watch how much CPU time each process uses, adjust processes’ priorities, and monitor process information; the innovative process throb window shows in an instant the activity of all the processes on your system.

Peek-a-Boo offers a wide choice of ways to help you explore the processes running on Mac OS X; you can choose between watching overall system behavior in a variety of windows, or zooming in to scrutinize individual process behavior.