Are there any project management systems made to emulate managing a project on paper. For instance lets say we are working internally and have 3 people working on a project. My designer sends me the mockup....id like to be able to draw on that and make notes saying this is good this isnt etc. Then it goes back to him for changes, he sends it back. I like it so i send it to person 3 for approval and they approve...all of this being logged. Anything like this? We currently do this on paper.