About iStat menus
Monitors your entire system right from your menubar, with 7 separate and highly configurable menu extras. You’ll always know exactly what’s going on inside your Mac!

CPU - Realtime CPU graphs and a list of the top 5 CPU resource hogs. CPU usage can be tracked by individual cores or with all cores combined, to save menubar space.

Memory - Memory stats for your menubar, shown as used and free memory or wired, active, inactive and free. The memory dropdown menu shows a list of the top 5 memory hogs, as well as other useful info.

And five others.

What’s new in this version?
- Snow Leopard support.
- Aqua skin support in all dropdowns.
- New menubar layout selectors.
- Installer now allows you to install for all users.
- Updated user interface.
- Plus many more new features and fixes.