Is there a good IDE to work with VHDL projects ? Or are most of the professionals working with emacs/vim/notepad++ ?
Answer
I use Emacs+VHDL-mode which is great if you don't mind (or have already climbed) the learning curve of Emacs.
Alternatively, you could try Sigasi-HDT which is Eclipse-based and has more GUI. And some more powerful refactoring tools by the look of it.