SecondBar
Source: http://blog.boastr.net/?page_id=79

If you, like me, work with multiple monitors, and are annoyed with the major operating systems' (Windows, Mac OS) lack of support in terms of extending the task/menu bar natively, at the very least, you might find these two free applications like a blessing. There are paid applications on Windows like Actual Multiple Monitors but for me the price for what I need (just a task/menubar showing open applications, and application icons) is just too much. And both these free apps are more than adequate for what I need, you might even want to donate a few bucks for each of these apps if you like them. So here they are:

Dual Monitor Taskbar (Win 7): http://sourceforge.net/projects/dualmonitortb/

SecondBar (Mac OS): http://blog.boastr.net/?page_id=79

Screenshot of extended menubar in Mac OS X Lion using SecondBar (click for larger image)

Its been a while I have written anything on technology, or should I say haven't written anything at all. Anyway, I have been looking for a way to extend menubar on my Mac as soon as I got a second monitor almost two years ago. I had been using utility-apps like DejaMenu or MenuPop to get access to menu items on the second monitor, however, not having an actual menubar on the second monitor was quite inconvenient. Just a couple of weeks ago, while searching for ways to extend menubar to the second monitor, I came across SecondBar , although it is still a beta-app, it works great. My second monitor finally looks like it’s a part of an extended display, a part of my mac desktop! Occasionally, SecondBar has problem showing all the menu items from an application but it is rectified by relaunching the app. Its certainly a great app for its purpose, and I still wonder why there aren't any app to extend menubar with full functionality on Mac as so many of us actually extend our display with a second or even a third monitor these days. Definitely worth a try!