I think that your hammer must be open source if possible if you develop software. Learn from mistakes of the past, like TextMate. We're lucky that the developer

I think that your hammer must be open source if possible if you develop software. Learn from mistakes of the past, like TextMate. We're lucky that the developer open sourced the project in the end, but that's not the way it usually goes. It's Vim or Emacs IMHO, ( Vim in my case )