How to add a shortcut in the menu bar?

So in other words, you have an application called "hummelbummel" for example, which resides in the Applications folder and maybe even has a Dock icon, but you still want one icon for "hummelbummel" in the Menu Bar, which means if you click in that icon, it will start "hummelbummel"?

http://menu.jeweledplatypus.org/ - a start maybe

 

There isn't any generic way to do this, you need an app to do it for you. There are several menu bar launcher apps, here's one for example

http://mactips-lib.net/m/software/alunch/en/main.html