As far as I know there is no tool which can tell about code flow of Apex and visual force page. These feature are dependent to an dedicated IDE build for particular language. Force.com IDE is basically a plugin runs on eclipse and require too much development. That plugin is even not able to provide code suggestion properly, so that functionality is impossible for now. You have to manually do this. And Force.com IDE is the only big tool available right now and this has no functionality like this. You can work offline through this its enough.