Interesting ideas in eproject.el for managing large software projects with Emacs.
I personally use anything.el, I should look into setting up some of these ideas with anything mode. If you don't use anything.el yet, totally check it out, it has made me 10x more productive in Emacs. I used iswitchb for years, and it's great, but anything.el is so smart, it's scary. Often it knows which buffer I want to switch to before I do.