A dock bar ready from instalation of ubuntu for easier quick access to work

For the people who works with several programs/desktops, could be a good idea to found a bar (like all the bars coming from gdesklets or similar) once ubuntu is intalled. a fully functional bar, i mean: operations like open programs just dragging a document inside the icon (as a mac bar does).
This would be very useful for people who need several programs opened at the same time because my experience working on a mac computers shows that this operations saves a lot of time at the end of the day.