Nexus comes the closest to resembling (and behaving) like the Mac OS X dock. There are two versions: Free and Ultimate. I think the Ultimate edition ($24.95) is really worth the coin. It offers unlimited docks, subdocks, tabs, and more, extending your desktop far beyond anything the standard Windows 7 interface offers.
Jack Wallen is an award-winning writer for TechRepublic and Linux.com. He’s an avid promoter of open source and the voice of The Android Expert. For more news about Jack Wallen, visit his website getjackd.net.