Setting up a development environment

Hi all,

I apologize if this is off topic for help-gnustep.
I have been trying to figure out a decent development environment for 
doing development in GNUstep.
Unfortunately is ProjectCenter not mature enough and I would like to 
contribute to that some day, but now I wonder  if there is a good 
setup for Emacs?
I come from a VisualWorks/Smalltalk background and I guess I am quite 
used to being able to see object hierarchies etc.
I have played around a little with oo-browser but I guess I miss 
something fundamental to be able to be able to browse the Base and Gui 
  classes.

What tools of the trade does people on this list use? Note, XCode of 
course - but I do not have the ability do develop on a Mac currently.

Best regards,
Tim