In Windows and Linux, Chrome allows you to save a website as an “app” icon to either your desktop or start menu. What’s nice about these apps is they run without the surrounding browser noise and are treated as separate instances of Chrome (you can open and close them without opening and closing Chrome proper). Such an icon is really handy for apps like Cloud9 IDE.
Unfortunately, the same is not provided Mac (who knows why?) However, with the help from this post some nice fellow geeks have written a bash script as well as an AppleScript way to do the heavy lifting. See the link below for more information (scroll to the bottom of the article for the link to the AppleScript).
The Intentional Geek 