Our company used basecamp (www.basecamphq.com) for project management purposes and it changed the email email games we used to play. Though we find out some even better product named www.proofhub.com provided the same or you can say better services at a cheaper and effective price. Now we see that various complexities we used to face have almost vanished to a high extent. I realy thank these products to make project management such an easy task.