not really. this is Windows. if you want OSX functionality, get OSX.
this is about as close as it gets as far as looks, but i have never used it so i don't know about functionality: WinStep: Desktop Themes and Customizing Windows!
ObjectDock from Stardock is another option. it doesn't support icon reflections, but it is more or less able to reproduce the functions of the windows taskbar. don't expect OSX style functioning though.
RocketDock is the other big contender in this field.