Not often I find a truly helpful utility. Glint by SciTech Concept, is especially useful for developers to test the system footprint of their program. Several Widgets and Objects have addressed system activity but none (IMHO) have come up with the elegant solution of Glint. This is a free program. I mention it here because as good as it is it could use some Stardock dressup. I used it recently to measure system activity w/ Impulse vs without. Besides all that, it looks great on a desktop.