iStat Menus 3, Monitor your Mac

iStat Menus is an advanced Mac system monitor, covering an enormous
range of stats. It lives right in your Mac’s menubar, so detailed
information is only ever a glance or single click away.

http://bjango.com/mac/istatmenus/
Merge pull request #83 from vmrob/istat-menus3

New Formula: iStat Menus 3, Monitor your Mac