I really like the set up of Source Insight, it has a context window for one click understanding of function calls and variables, and a relations window for where functions are called in a project and where variables are used in the project.
It is very good for jumping around in a project and understanding the use of variables, but one thing that's missing is tabbed windows and dividers. It is stuck in the one source file, one window phase of IDE development, before tabs and vertical/horizontal dividers got popular.
It is also very good at finding references for variables and functions, much better than code blocks, codewright, and eclipse (really tried all of them).
Does anyone know or have a set up similar to Source Insight but with Tabs and dividers?