VirtualBus is a great and free simulator where you drive a bus.
When you drive the bus you've got to obey the timetable, you can't depart from the bus stop too soon and you must not be there too late. You have to take care that all the passengers got on or got out. You will be given the points if the door of the bus will be opened at most 7 meters from the bus stop (arrow over the bus turns green). The green figure is the figure of the passengers who are on the bus. The blue one want to got out on the nearest stop. The red one are the one that are waiting to the nearest stop.
