PUBLIC MARKS with tag menubar

monitor and display your battery’s current charge

SecondBar Puts a Menu Bar on All Your Mac's Monitors

Menubar items (also known as menu extras, status items, and menulets) are those little things on the top right of your menubar.

MenuMeters is a set of CPU, memory, disk, and network monitoring tools for MacOS X. Although there are numerous other programs which do the same thing, none had quite the feature set I was looking for. Most were windows that sat in a corner or on the desktop, which are inevitably obscured by document windows on a PowerBook's small screen. Those monitors which used the menubar mostly used the NSStatusItem API, which has the annoying tendency to totally reorder my menubar on every login.