If you are looking for a Freeware application to launch your applications very easily then you can try with Aqua Dock. Aqua Dock is an OS X style, animated launchbar/taskbar for your Windows XP machine.
You can easily customize the look of each item on the dock and set various animation options for when the mouse is over an item on the dock. When you move your mouse over an Icon it expands to show you the Application clearly. In short, Aqua Dock is a task bar and a Windows program launcher that gives you a Apple’s MAC style for your PC.