Firebug. It takes a lot of space. I work on 17" 5 year old Macbook Pro and could not imagine working on an 11" screen. Also ShiftIt and Alfred are probaly the m

Firebug. It takes a lot of space. I work on 17" 5 year old Macbook Pro and could not imagine working on an 11" screen. Also ShiftIt and Alfred are probaly the most useful productivity apps I have used.