What is your toolset?

After quitting all the non-development tools running on my MacBook I realized this is another kind of Minimal Mac. This minimalism has little to do with a tidy surface but instead a tidy toolset. Apart from the Drag application used to take the screen shot these applications -- iTunes, NetBeans, Screen Sharing, FireFox, Skype, and Terminal -- are my toolset. What is your toolset?